Updated list from information printed in the current addition of British Bus Publishing's Stagecoach Fleet Handbook. Information that is still tbc is highlighted in italic text

131 ADL Enviro 400MMCs
11139-11156 (YX68 UWN/O/P/R/S/T/U/V/W/Y/Z, UXA/B/C/D/E/F/G): Stagecoach Cumbria & North Lancashire (Morecambe)
11157 (YX68 UXH): Stagecoach Cumbria & North Lancashire (Carlisle)
11158 (YX68 UXJ): Stagecoach Cumbria & North Lancashire (Carlisle) but currently with Stagecoach UK Bus for IT cloud evaluation
11161-11162 (SK19 EKD/E): Stagecoach North Scotland (Elgin)
11163-11175 (SK19 EKF/G/H/J/L/M/O/P/R/T/U/V, EKA): Stagecoach North Scotland (Macduff)
11176-11191 (YX19 OUA/B/C/D/E/F/G/H/J/K/L//N/O/P/S): Stagecoach East Scotland (Aberhill)
11192-11201 (YW19 VUO/P/R/S/T/U/V/X/Y): Stagecoach East Midlands (Hull)
11202-11215 (SK19 EVT/U/V/W/X/Y, EWA/B/C/D/E/F/G/H): Stagecoach Cumbria & North Lancashire (Morecambe)
11216-11232: Stagecoach Midlands (Northampton)
11233-11253: Stagecoach Oxfordshire (Witney)
11253-11271: Stagecoach Manchester (Sharston)

95 ADL Enviro 200MMC (11.8m)
26231-26254 (YW19 VNA/B/C/D/E/F/G/H/J/K/L/M/N/O/P/R/S/T/U/V/X/Y/Z, VPA): Stagecoach South East (Thanet)
26255-26275 (YW19 VRC/D/E/F/G/J/K/L/M/N/O/P/R/T/U/V/X/Y/Z, VSA/C): Stagecoach East Midlands (Hull)
26276-26293: Stagecoach North East (Stockton)
26294-26325 Stagecoach South (Basingstoke)

28 ADL Enviro 200 MMC (10.8m)
37602-37615: Stagecoach Yorkshire (Sheffield Holbrook)
37616-37629: Stagecoach West (Cheltenham)

12 Volvo B8L/ADL Enviro 400MMC XLB
13901-13912: Stagecoach East (Fenstanton/Busway)

32 BYD/ADL Enviro 400 400 electric
14001-14032: Stagecoach Manchester (Sharston)

12 Optare Metrocity electric
25401-25412: Stagecoach South Wales (Caerphilly)

4 Optare Solo electric
48907-48911: Stagecoach South Wales (Caerphilly)

3 Optare Solo SR slimline
48041-48043: Stagecoach South Wales (Merthyr)

12 Volvo B8RLE/MCV
21351-62 (BV19 LPA/C/E, LRF, LPJ/K/L/N/O/P/U/X): Stagecoach South Wales (Merthyr)

14 Volvo B11RLE double deck coaches
50406-50411: Stagecoach West Scotland (Megabus/Cumbernauld)
50412-50419: Stagecoach West Scotland (CityLink/Cumbernauld)

8 Volvo B11R/Caetano Levante III coaches
54404-54411 (BV19 XPG/H/J/K/L/M/N/?): Stagecoach Yorkshire (National Express duties/Chesterfield)