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Vehicle numbering
Individual vehicles are numbered in the following ranges:
{| class="wikitable"
!BDMSO
!TSO
!DMSO
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|align=center|64367–64399
|align=center|71342–71374
|align=center|64405–64437
|}
Liveries
Class 507 units have appeared in a number of liveries:
- British Rail blue and grey, 1978
- MerseyrailCapital of Culture, 2008–2009; four units with graphics overlaid on the Merseyrail refurbished livery.
- MerseyrailGood Communications, January 2014–2024; six different designs on a mix of yellow and grey backgrounds.
- Merseyrail – Liverpool Hope University, –2024 applied to unit 507002 as promotion for Liverpool Hope University.
- Merseyrail – Heritage (BR Blue and Grey), 2023 onwards; applied to unit 507001 to celebrate 45 years of passenger service.
Named units
Named units were as follows:
- 507008 – Harold Wilson
- 507009 – Dixie Dean
- 507016 – Merseyrail – celebrating the first ten years 2003–2013
- 507020 – John Peel
- 507023 – Operations Inspector Stuart Mason
- 507026 – Councillor George Howard
- 507033 – Councillor Jack Spriggs