Full update - with the latest registrations (missing the Barnsley E200s as there appears to be a change to the registrations)

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: Merseyside (Birkenhead - Gold Spec)
10889-10894: Stagecoach South (Winchester)
10895: Stagecoach Bluebird (Aberdeen)
10896-10901: East Midlands (Gainsborough)
10902-10905: Stagecoach Oxford (Oxford - Gold Spec)
10906-10932: Western Buses (Kilmarnock)

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: 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/L/M/O/P/R/S): Stagecoach South (Portsmouth)
26166-26171: Fife Scottish (Dunfermline)
26172-26177: East Midlands (Scunthorpe)
26178-26202: Midland Red South (Nuneaton - Gold Spec)

Alexander-Dennis Enviro200 MMC
37451-37474: Stagecoach Wales (Porth)
37475-37480: Yorkshire (Barnsley)
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 (Rugby 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)