AEC's Blue Triangle symbol [ AEC Ltd] is reproduced by kind permission of The British Commercial Vehicle Museum Trust.
  AEC DEMONSTRATORS  
A.E.C. assigned a significant number of vehicles to sales demonstration duties over the years. Prior to the abolition of Middlesex County Council in the local government reforms of 1965, A.E.C. registered many buses and lorries in its own right at the County's vehicle registration office at West Ealing. If you have a photo of an A.E.C. that has the letter "M" in the number plate, there's a good chance that it's a demonstrator or other vehicle actually registered by AEC itself.
Of course there will be many exceptions to that last statement! The NML-E/SMK-F London Transport RMLs and SMM-F/AML-H Merlins & Swifts for example! And any Middlesex-based independent psv operator purchasing new A.E.C.s would have had them registered in the county.
The details below have been drawn from PSV Circle chassis lists, from many AEC-related books and brochures, and from various photographs in my collection. The list is far from complete! The large number of early Regent-type demonstrators was probably matched by a similar number of Regals, but I don't have any early Regal data, and there is virtually no information about commercials.
The chassis number of Regal IV prototype UMP227 is mis-quoted in several publications, including those by Alan Townsin, as U135974. The PSV Circle has it correctly as U134974, which is consistent with other chassis numbers of the period such as one-off Regent IV U134975 and left-hand drive Regal IV prototype U134976.
The Middlesex C.C. marks were H, HX, MC, MD, ME, MF, MG, MH, MK, ML, MM, MP, MT, MU, MV, MX AND MY.
Some vehicles listed don't have Middlesex marks. The last item on the list, the Mandator, has a Preston registration. (Guess why!)
Despite the shortcomings I hope the list and photos will be of interest. If anyone is able to flesh out the story with registration details or pictures please don't hesitate to get in touch.
REG NOCHASSIS NOYEARBODYWORKAFTER DEMONSTRATION SOLD TO
A E C   5 0 9
MP 970 509001 1927 L.G.O.C. Rebodied as a goods vehicle, 1929.
A E C   R E L I A N C E   6 6 0
MT 1330 660002 1928 L.G.O.C. · B31R Chiltern Bus Co of Tring; orginally chassis 426005.
MT 3228 660009 1929 Hall, Lewis · B??- Great Northern Railway of Belfast, No 46.
MY 639 660311 1929 Short · B31R unknown
MY 1415 660371 1929 Short · B??- Nevin Blue; Crosville 87 then T3.
TK 1662 660001 1928 Harrington · B32F Sharp of Longsight; originally chassis 426018.
A E C   R E G E N T   6 6 1 / O 6 6 1
Regent HX1388 via John Law  Regent TV4867 via David Simpson
CN 4520 661774 1930 Short · L24/26R Southend Borough.
GE 6326 661012 1929 Hall, Lewis · L26/24R A.E.C. staff transport.
HX 1091 6611002 1930 Short · H26/24R T.G. Harries of Pontardulais; re-reg'd TG 2037.
HX 1388 6611007 1931 Strachan · H26/24R Highland Transport, No 7.
HX 2980 6611006 1931 Short · H26/24R Westcliff-on-Sea Motor Services.
JA 1291 661782 1930 Short · H24/26R J.G. Severn of Alfreton.
JF 223 661129 1930 Ransomes · H27/22R Widely demonstrated then to Campion of Nottingham.
KG 1005 661036 1929 Short · H28/24R Western Welsh, No 181.
KG 1251 6611849 1932 Weymann · L25/25R Cardiff Corporation, No 76.
KR 4997 661776 1930 Short · L24/26R Southend Borough.
MT 2114 661001 1929 Short · L26/24RO Halifax Corporation, No 57.
MV 105 6611158 1931 Weymann · L24/24R Sheffield Corporation, No 66.
MV 842 6611850 1931 Brush · H30/26R Westcliff-on-Sea Motor Services.
MV 983 6611753 1931 Park Royal · H28/24R Norwich Electric Traction Co.
MV 984 6611754 1931 Park Royal · H28/24R Norwich Electric Traction Co.
MV 1518 6611800 1932 Brush · H30/26R Lancaster Corporation, No 4.
MV 1905 6611005 1930 Short · H28/24R Western Welsh, No 180.
MV 2271 6611842 1932 Park Royal · H26/24R Dundee Corporation, No 61.
MV 2764 6611809 1932 Short · H26/26R Sheffield Corporation, No 139.
MV 3161 6611830 1932 Short · H30/26R White's Motors of Cardiff & Barry, No 102.
MV 3506 6611848 1932 Short · L29/26R White's Motors of Cardiff & Barry, No 112.
MV 3522 6612052 1932 Park Royal · H28/26R Halifax Corporation, No 9.
MV 3749 6612050 1932 Weymann · H26/24R Bradford Corporation, No 392.
MV 3994 6611729 1932 Met-Camm · H27/22R Westcliff-on-Sea Motor Services.
MY 2102 O661131 1930 Short · H24/26R Northern General, No 561.
MY 2126 661034 1929 Short · H24/24RO Enterprise of Clacton, No 37.
MY 2542 661033 1929 Short · L24/24R Southend Borough, No 29.
MY 3076 661132 1930 Short · L24/26R Glasgow G.O.C., No M1.
OF 8368 661035 1930 Short · H28/24R Birmingham Corporation, No 368.
TF 9646 6612049 1932 E.E.C. · H24/24R Lancaster Corporation, No 5.
TV 4867 6611159 1931 Park Royal · H30/26R White's Motors of Cardiff & Barry, No 104.
AMD 525 6612142 1933 Weymann · H26/26R Sheffield Corporation, No 140.
AML 272 6612267 1933 Park Royal · H27/27R Burnley Colne & Nelson J.C., No 151.
AML 300 6612254 1933 Weymann · H26/22R Exeter Corporation, No 142.
AML 508 6612268 1933 Park Royal · H28/27R Hull Corporation, No 128.
AML 664 6612270 1933 Park Royal · H28/26R Hull Corporation, No 147.
AMV 482 6612051 1934 Park Royal · H28/26R Halifax Corporation, No 8.
BMG 969 6612470 1934 Park Royal · L26/26R Sheffield Corporation, No 261.
BMT 6 O6612685 1934 Weymann · H30/26R Sheffield Corporation, No 204.
CMC 269 O6612772 1935 Park Royal · H28/26R Huddersfield Corporation, No 125.
CML 516 O6613200 1935 Park Royal · H30/26R Halifax Corporation, No 24.
DHX 125 O6613577 1935 Park Royal · H30/26R Aberdeen Corporation, No 107.
DHX 504 O6613749 1935 Park Royal · H30/26R Walsall Corporation, No 60.
EML 154 O6613720 1936 Park Royal · H30/26R Baker Bros of Warsop, No 31.
EML 876 O6613792 1936 Park Royal · H30/26R Newcastle Corporation, No 196.
JML 409 O6615413 1938 Weymann · H30/26R Bradford Corporation, No 466.
JML 784 O6615963 1938 Weymann · H30/26R Gosport & Fareham, No 48.
KMD 306 O6615964 1938 Park Royal · H30/26R Gosport & Fareham, No 49.
A E C   R E G A L   6 6 2
JH 2701 662478 1930 L.G.O.C. Lima; Watford Omnibus Co; L.P.T.B. T369; scrapped 1949.
MY 2276 unknown 1930 Hall, Lewis (or Short) Watford Omnibus Co; L.P.T.B. T371; scrapped 1939.
A E C   R E G A L   4   6 4 2
HX 1271 642001 1930 Burlingham · B32F Bell's Services of Westerhope; chassis rebuilt 662277.
MN 5108 642059 1933 Burlingham · B32R Isle of Man Road Services, No 51.
MV 295 642008 1931 Short · B32F Gelligaer, No 14.
MV 1703 642009 1932 Park Royal · B30R Chambers of Bures.
MV 2675 642020 1932 Brush · B32R unknown
MV 3529 642025 1932 Duple · C32R Partridge of Layham; re-reg'd GV 2407.
AMD 47 642010 1933 Park Royal · B32- Gough of Mountain Ash.
BME 520 642074 1934 Cowieson · B32F Bacon of Immingham.
BML 414 642057 1934 Willowbrook · B35F Chassis renumbered 06621803.
A E C   R E N O W N   6 6 3
GG 4681 663953 1931 Cowieson · H32/28R Glasgow Corporation, No 50.
MV 489 663952 1931 Brush · H33/23R Birmingham City, No 92.
N/A 663954 1931 N/A 1931 exhibition chassis; dismantled 1933.
A E C   T R O L L E Y B U S   6 6 3 T
HX 1460 663T001 1930 E. Electric · H60R Southend Corporation; re-reg'd JN 2086.
A E C   R E N O W N   6 6 4 / O 6 6 4
MV 468 664060 1931 Park Royal · C35R Batten, London E6.
MV 2906 664214 1931 Met-Camm · H35/20R White's Motors of Cardiff & Barry, No 103.
CMF 843 O664254 1935 Weymann · B43F Valliant Direct of Ealing.
A E C   R A N G E R   6 6 5
MV 346 665004 1931 Park Royal · C26D Robertson of Dundee, No 26.
MV 347 665008 1931 Harrington · C26R Law of Tipton.
A E C   M A M M O T H   6 6 7
MY 2127 667... 1929 8-ton flatbed
A E C   R A N G E R   6 7 0
Unknown 670032 1931 Medley (goods) Shell Carrying Co.
A E C   M E R C U R Y   O 6 4 0
AMK 274 O6402020 1933 Medley Booker (goods) Chinnery of Acton, Suffolk.
A E C   Q   7 6 1 / O 7 6 1
Q AMV433 from the aecsouthall.co.uk archive
AHX 63 761001 1933 Met-Camm · H31/29F Birmingham City.
AMD 256 761002 1933 Met-Camm · H32/28F Crosville, No 1000.
AML 663 761015 1933 Roe · H29/27C Grimsby Corporation, No 48.
AMV 433 O761016 1934 Park Royal · H31/29F Believed scrapped.
A E C   Q   7 6 2 / O 7 6 2
AMV 124 762004 1934 Weymann · B39C H. Sharp of Manchester.
BME 130 762003 1934 Duple · C36C Waltham Belle of Waltham Abbey.
BML 488 O762038 1934 Weymann · B39C South Wales, No 365.
YJ 2803 O762039 1935 Weymann · B38C Dundee Corporation, No 1.
A E C   M A T A D O R   I I   0 3 4 6
Monarch BHX472, AEC Gazette August 1935
BHX 472 0346... 1935 4x2 Flatbed
A E C   M A M M O T H   M A J OR   I I   0 3 8 6
Mammoth Major BMT994, AEC Gazette August 1935
BMT 994 0386... 1935 8x4 Flatbed
A E C   R E G A L   I I   0 8 6 2
CHX 834 O862002 1935 Harrington · B34R Gorseinon & District of Gowerton.
EMF 94 O862035 1936 Weymann · B34R Baker of Warsop, No 30.
A E C   R E G E N T   I I I   O 9 6 1 / 9 6 1 2 / 9 6 1 3
N/A U128389 1949 Roe · L29/27F Test chassis; to Liss & District of Bordon, 1961; reg'd 150 AOU.
N/A 9613A1330 1948 Testbed chassis National Coal Board, Mine Recovery Vehicle; reg'd GKG 502.
N/A 9612A2611 1950 Roe · L29/27F Test chassis; to Liss & District of Bordon, 1959; reg'd VHO 123.
N/A 9613A2615 1951 Park Royal · H30/26R Potteries, No 490; reg'd PVT 936.
SMU 194 9612E5337 1950 Park Royal · H30/26R D. Jones of Pantdu.
A E C   R E G E N T   I I I   6 8 1 1 / 6 8 1 2 / 6 8 1 3
JKC 240 U129796 1948 Weymann · H30/26R Prototype 6811A; to Liverpool Corporation, No A656.
7194 H U163996 1953 Park Royal · H32/26R Prototype 6813S; to Mayne of Manchester.
A E C   R E G E N T   I V
N/A U134975 1949 Crossley · H30/30R Rebodied Park Royal H34/30R; dismantled.
A E C   R E G A L   I V
Regal IV UMP227 from the aecsouthall.co.uk archive  Regal IV U134976 courtesy of Jan Emmelkamp
Regal IV NMN355 (VMK271) by Cliff Essex  Regal IV NYD509 courtesy of NA3T
UMP 227 U134974 1949 Park Royal · B40F AEC Experimental Dept; preserved.
N/A U134976 1949 Park Royal · B36D HTM Holland H·86485; reg'd UPF445 on return to UK.
VMK 271 U137523 1950 Park Royal · B38F Douglas Corporation, No 31; re-reg NMN 355.
N/A U137524 1950 Park Royal · C36F Knowles of Bolton; rebodied Burlingham C41C; reg'd VRF 39.
NYD 509 U137525 1950 Duple · C37C Berry of Bradford-on-Tone.
YMF 82 9822S1379 1953 Roe · B44F McGill of Barrhead.
A E C   M O N O C O A C H
Monocoach 210AMP by M A Penn  Monocoach 168DMU Omnicolour ref G183
NLP 635 U163473 1953 Park Royal · B44F West Monmouthshire, No 20.
210 AMP U163531 1953 Park Royal · B44F Llynffi of Maesteg, No 67.
168 DMU MC3RV053 1955 Willowbrook · B45F West Monmouthshire, No 16.
A E C   M E R C U R Y   G M 4 R
Mercury 168DMP from the aecsouthall.co.uk archive
29 AMU GM4R... 1954 8-ton flatbed
168 DMP GM4R... 1955 8-ton flatbed
A E C   R E L I A N C E
Reliance 50AMC Omnicolour ref D333   Reliance 215CML (KUX378) courtesy of NA3T
Reliance 7385ME from the aecsouthall.co.uk archive  Reliance 327NMP by M A Penn
50 AMC U163452 1953 Park Royal · B44F Armstrong of Ebchester.
135 BMV U163451 1953 Duple · C41C Parlane of Aldershot.
215 CML MU3RV286 1954 Duple · C41C Seagull of Great Yarmouth; original reg KUX 378.
N/A U186448 1958 Park Royal · B13F Edmunds of Rassau; upseated to B45F; reg'd 355 FWO.
281 WMV U188522 1960 Duple · C41F Morley of Edwinstowe.
N/A 2MU3RA2636 1959 Duple · C41C K.W. Services of Daventry; reg'd VRP 909.
7385 ME 2MU3RA3078 1960 Duple · C41F Grey-Green.
327 NMP 4MU3RA2402 1962 Park Royal · B54F Coastal of Portrush, Co Antrim.
A E C   R E G E N T   V
Regent V 88CMV Omnicolour ref A323
88 CMV CMD3RV001 1956 Park Royal · H33/28R O.K.Motor Services; chassis no originally U168623.
159 JHX MD2RA298 1956 Park Royal · H37/28R King Alfred, Winchester.
A E C   B R I D G E M A S T E R
Bridgemaster 9JML Omnicolour ref D007  Bridgemaster 76MME Omnicolour ref E007
9 JML MB2RA002 1956 Crossley · H41/31R Birmingham Corporation, No 3228.
60 MMD B3RA003 1957 Crossley · H41/31R South Wales, No 1213.
76 MME B3RA004 1957 Crossley · H41/31R Barton Transport, No 805.
116 TMD B3RA006 1958 Park Royal · H45/31R Liverpool Corporation, No E3*.
80 WMH B3RA039 1959 Park Royal · H45/31R Osborne's of Tollesbury, No 7.
2211 MK 2B3RA067 1960 Park Royal · H43/29F Osborne's of Tollesbury, No 11.
A E C   R E N O W N
Renown 8071ML Omnicolour ref N075
7552 MX U204544 1962 Park Royal · H39/21F Burwell & District.
8071 ML U204545 1962 Park Royal · H44/31F Osborne's of Tollesbury, No 18.
A E C   S W I F T
Swift FGW498C by Cliff Essex
FGW 498C MP2R001 1965 Willowbrook · B53F Gelligaer U.D.C.
LYY 827D MP2R011 1966 Marshall · B48D Ulsterbus; re-reg'd CIA 3000.
A E C   M A N D A T O R   T G 4 R
Mandator VTD837M via Phil Wallace
VTD 837M TG4R... 1974 Tractor unit
Recommended links
NA3T - The National Archive of Transport, Travel & Trade
Omnicolour UK Bus Slides
The PSV Circle

Acknowledgements
Bob Jenner-Hobbs for permission to use NA3T photos.
Chris Aston for permission to use Omnicolour slides.
Thanks to Maurice Bateman for amendments to the chassis list.
For the supply of photos thank you Cliff Essex, M A Penn, Peter Relf, Jan Emmelkamp & Phil Wallace.
The PSV Circle.


vangastow@aecsouthall.co.uk