Elisabeth,
I use Coventry Aquatics in Allesley Park, Coventry. www.covaquatics.co.uk
They are pretty good, take a look at their web site.
I also use R & S aquatics which are based in the Coventry city centre, actually the bus station.
His fish are very good, and he doesn't mind spending the time with you.
Hope this helps.
P.S my mothers family are based in Leamington Spa.
Gaza