Hello Dave.
There is a quite small oval shaped boating pond on Gorleston sea front, quite shallow which is good and filled with fresh water.
Also, there is a fountain thing in the middle circled by spiked metal fingers at water level, have seen several powered models impailed on them.
Coltishall has a river and a good pub but no lake that I know of, not a public one anyway.
We do have many rivers and broads here but more importantly, what seems like thousands of holiday hire cruisers, some of the drivers do leave a lot to be desired on the skill front.
Reminds me of the M25 in the daytime except that there is, unfortunately, no lane markings or central Armco barrier.
I'll probably test it on our little pond, make sure all is well, then take it to my sons to be handed over to the boys, apparently there is a goodly size lake in Chichester.
Mike.