Most of them seem to be from the Norfolk Broads / East Anglia and taken some time between 1908 and 1930.
You can see these in two sets on flickr :-
Box 1 (Mostly Norfolk Broads)
Box 2 (Some Lakes and Hills + General including what appears to be a holiday in Gorleston-on-sea)
If anyone can help out by identifying any locations/people etc., I'd be most grateful.