Decipher the Signatures

Following on from the Field Service Engineers post,  this remarkable document has come to light and we need your help to decipher some of the names.

signatures Standard Triumph
Some of the names (and faces) can be seen on the Field Service Engineers post – but not all. Can you help?
Here’s what we have on the photo, so far:
Ray Hay – Coventry
Ron Parr – Blackpool
Roger Maingot – London
? – Allesley
Eric A Williams – Marketing (or something else?)
Lester W Stevens
Peter Cole? – Western Avenue
Reg England- Cockney
? – Alton?
W Siddle – Kingston Upon Thames
? – Bradford
(on Right side) Ken Steeley – Kenilworth