i have nearly 200 coins that i need to convert into gbp
where is the best place to do so quickly and with the least charges
For that size of traction the best cash-out method might be to simply trade at MTGox's btc/GBP market and then do an international bank wire.
You could break it up into multiple trades at various exchanges and perhaps come out a little better. They are often individuals buying for cash through LocalBItcoins.
Or the bitcoin-otc marketplace also might help you find buyers.
Here is a thread from someone looking to buy a smaller quantity.