Big Update - gaps filled for the Preston Scanias and Gainsborough E400s. Plus the reported registrations for the Welsh Gold E200s (likely therefore that the short examples listed for Wales are for Nuneaton)

Alexander-Dennis Enviro400 MMC
10811-10843 (SM66 VAO, VBT/U/V/X/Y/Z, VCA/C/D/E/F/G/J, VBN/O/P, VAU/V/X, VBA/B/C/D/E/F/G/J/K/L, SN17 MHU/V/X): Merseyside (Gillmoss)
10844-10865 (SN17 MHY/Z, MJE/F/J/K/O/U/V/X/Y, MKA/C/D/E/F/G/J/K/L/M/O): Manchester (Middleton)
10866-10881 (YX67 VDA/C/D/E/F/G/J/K/L/M/N/O/P/R/T/V): East (Cambridge)
10882-10888 (YX67 VCP/T/U/V/W/Y/Z): Merseyside (Birkenhead - Gold Spec)
10889-10894 (YX67 VCA/C/D/E/F/G): Stagecoach South (Winchester)
10895 (SN67 WUW): Stagecoach Bluebird (Aberdeen - JET 727)
10896-10901 (YX67 VCJ/K/L/M/N/O): East Midlands (Gainsborough)
10902-10905: Stagecoach Oxford (Oxford - Gold Spec)
10906-10932: Western Buses (Kilmarnock) - on delivery now but no fleetnumbers to registrations currently known

Volvo B5LH/Alexander-Dennis Enviro400 MMC
13111-13117 (SF17 VMT/U/V/W/X/Y/Z): Fife Scottish (Arbroath)

Volvo B5TL/Wright Gemini 3 (Open-Top)
13801-13807 (BV17 CTE/F/K/O/U/X/Y): Cumbria & North Lancs (Kendal)

Scania N250UD/Alexander-Dennis Enviro400 MMC
15291-15294 (YN17 ONA/B/C/D): East (Fenstanton)
15295-15305 (YN67 YKM/O/P/R/S/T/U/V/W/X/Y): Merseyside (Preston)
15306-15327 (YN67 YJO/P/R/S/T/U/V/W/X/Y/Z, YKA/B/C/D/E/F/G/H/J/K/L): South West (Torquay)
15328-15339: South East (Eastbourne)
15340-15349: West (Swindon)

Volvo B8RLE/Wright Eclipse 3
21311-21312: East (Cambridge)

Alexander-Dennis Enviro200 MMC (11.8m)
26141-26145 (SN67 WVJ/K/L/M/O): Manchester (Stockport)
26146-26165 (SN67 WVP/R/S/T/U/V/W/X/Y/Z, WWA/B/C/D/E/F/G/H/J/K): Stagecoach South (Portsmouth)
26166-26171 (SN67 WWL/K/O/P/R/S): Fife Scottish (Dunfermline - JET 747)
26172-26173 (YX67 VHD/E): East Midlands (Hull - Fast Cats)
26174-26177 (YX67 VHF/G/H, UZA): East Midlands (Scunthorpe)
26178-26202 (YX67 UZN/O/P/R/S/T/U/V/W/Y, VAA/D/E/F/H/J/K/M/O/U/V/Y, VBA/B): Wales (Porth- Gold Spec)

Alexander-Dennis Enviro200 MMC
37451-37456 (YX67 VGM/O/P/R/T/U): Yorkshire (Barnsley - Townline 1)
37457-37480: Midland Red South (Nuneaton)
37481-37490: East Midlands (Lincoln)

Wright Streetlite DF (11.8m)
39101-39118: Yorkshire (Sheffield Ecclesfield)

Volvo B11R/Plaxton Elite I (15 Metre)
54285-54293 (YX67 UPN/O/P/R/S/T/V/W/Y): Midlands (Cwmbran Megabus)

Volvo B11R/Plaxton Elite (15 Metre)
54356-54361 (YX67 UPA/B/C/D/E/F): Fife Scottish (Glenrothes)
54362-54363 (YX67 UPG/H): Fife Scottish (Perth)

Volvo B11R/Caetano Levante II
54401-54403 (BV67 JXX/Y/Z): Yorkshire (Chesterfield)

Volvo B11R/Plaxton Elite (11 Metre)
54821-54824 (YX67 UPJ/K/L/M): Highlands (Inverness Citylink)
54825-54834 (YX67 URA/B/C/E/F/G/H/J/K/L): Bluebird (MacDuff)