Interested to read this - and struck by the lack of replies.
Until recently I'd never even considered booking an agency girl - too suspicious about who's really behind them, possibility of fake photos, bait & switch, elevated prices etc. However, the other day I received trusted recommendations for no fewer than four agencies, but they are ALL based in either Manchester or Leeds (for the record they are Manchester Elite, The Bond Girls, McKenzies and I.K Services).
Is there really nothing at all of any merit in the West or East Midlands?