Hi Danny,
In Leeds there is:
Stillwaters -
Roundhay Park Lake, Roundhay
Swillington Fisheries, Swillington
No Go Bye Farm, Yeadon/Cookridge
Yeadon Tarn, Yeadon
Middleton Park Lake, Middleton
Whitehall Road Lake, New Farnley
Farm Lake, Off Geldard Road behind Porta-Cabins
Knotsford Lagoon, Pool-in-Wharfedale
Carp Lakes, Whitehall Rd, Driglington
Rivers/Canals -
Leeds & Liverpool Canal,
River Aire,
River Wharfe, Pool-in-Wharfedale
Try also Leeds & District Amalgamated Society of Anglers (Anglers Club, 75 Stoney Rock Lane, Beckett Street, Leeds LS9 7TB) as they have a cracking Juvenile and Intermediates section that I'm sure still organises days out for it's members.
Dave