hi mjw
http://www.timsburyfishing.com/coarsefishing.htm
this is the only place i know of. been there twice had grayling and chub on the first time, and just grayling on the second. there are some huge roach in the carrier but i found them really hard to catch. best swim i found was the one where the carrier comes in, or just u from that by the hut on the opposite bank.
its quite expensive at £18, but its quite an exclusive river so its not too bad.
atb
tim