Leamington have a section of the Avon just south of Warwick and it bookends the BAA 'Manor Farm' section, they have other bits downriver too. There ia Wear just downstream of this section which makes the river relatively slow and deep, and catches are poor. Guest passes are allowed on the Plough section, a member can obtain a limited number per season, but I believe they have to accompany you. Membership is only £30 per season and a random number of members, selected by the committee, MUST undertake Work programmes before June 16. I've managed to avoid the draft so far! I don't particularly target Barbel either, I just like the odd one now and and agin. This section sounds just what you're looking for as it has a good variety of different swims with deeper sections nearer Coventry & shallower runs in the middle (there are over 100 pegs). It is v. popular and sold out two years ago, but I have had periods of fishing mid-week where I never saw another Angler in six successive visits.