Available unit numbers
“Tenner-a-month” premium members can choose their favourite 507 or 508 unit number on a first-come, first-served basis.
Please note this list is updated manually. If your requested number is unavailable, we will contact you and give the option to choose a different one. We recommend you give us a second or third choice on the sign-up form.
All the numbers listed below are available (last update 18th October 2026)
507
- All unit numbers are taken!
508
Original Southern Region numbers
- 508005
- 508006
- 508008 to 508038
- 508040 to 508043
Merseyrail numbers
- 508102
- 508103
- 508105
- 508106
- 508109
- 508110
- 508115 to 508119
- 508121
- 508122
- 508127 to 508130
- 508132
- 508133
- 508135
- 508140
Southeastern / Silverlink numbers
- 508201 to 508207
- 508209 to 508212
- 508302 and 508303
