for the landlocked, it is also worth checking out the various chandlers on the canal system. granted they will not have everything for sailing boats, but useful for stainless screws and so on.
Midland Chandlers are a bit like the canal version of marine megastore though, price wise.
I have also used force4 and seamark nunn for bits for my narrowboat which nearly complete now (hence the interest in canals) and found them very good.
Happy boating
steve
Storm 15 "Robin"
&
NB "Fred Bingham"