Well, many thanks to all who replied, it certainly got a few people talking. I have a Kiwi accent - which is really no accent at all, - and I did want to be able to say these places correctly, so now I can.
Robin
King William,
Of course you don't have an accent..... Canadians will say the same thing

.... but in England the accent is said to change every 10 miles as you can see by the discussion you started. You say it whichever way you feel like and to heck with the pedants.
Bye the way - Rutherfurd's "London" is very good and his "The Forest" gives a good description of people trapped in the civil war.