Just went for first OW swim this morning at Shepperton in Ferry Lake - beautiful lake, lots of first timers and really nice, friendly organisers.
Managed not to drown or wee in wetsuit (it was far too tight!)although very slow. thanks Mr Happy for recommendation.
Holly - not a weed in sight!
Here is link - first swim free, thereafter £4
http://www.trainfresh.com/Fresh-Water.aspx