Yep. Thats how the cockle pickers get caught out, further up the coast in Morecambe Bay. Weren't they illegal immigrants too?
http://news.bbc.co.uk/1/hi/england/l...re/3464203.stm
Yes. The sands slope away at a low gradient. We were drilling wells off Blackpool and quite a way out to sea and yet the water was only 45ft deep at mean tide.