Paul
You have Sittingbourne Angling Club no rivers though but 4 lakes with a good head of 20's and 30's. Used to fish them a lot myself when I lived in Sittingbourne.
Mid Kent Fisheries some very very good lakes and river fishing.
Meadway Valley lakes in the Snodland area.
Maidstone and Victory Angling club.
Thats about all I can think of from the top of my head at the moment.
Cheers
Dave