piatkow - 11:49 am on Aug 2, 2010 (gmt 0)
For Romford I would always search as Essex as it is outside of the London postal area although part of the Greater London connurbation.
I assume that your question was insspired by the job that was advertised recently. I would guess that the role is with a consultancy rather than an end user. On the other hand the role could be with the Barking based owner of the dog track which is a major national gambling chain and the role went out with the advertising agency's location rather than the job's.