A decision has been made. After much soul-searching, I've decided on two separate bases, both ships at sea and under-way. I'm not fond of ships in harbour and even less sat on brass pillars, you never see them like that, they only come alive when they go to sea.
If I did do some sort of a diorama, ships under way would need a huge base, any-thing less than a ships length apart is generally to be avoided. A dock-yard type diorama would involve cranes, vehicles, buildings and probably lots of people so I've chickened out.
Might do one in 1:700 scale some day. Perhaps a Battle-ship and some destroyers, lots of little boats sculling around. White Ensign do some nice little armed trawlers in resin at that scale, quite cheap too for a resin kit.
Haddock.