Morning all
I agree with bonsai, it's not worth the hassle trading the FTSE after hours. I had similar problems to you in the past, Agincourt, where I tried to close a position, and D4F either kept me waiting and gave me a worse quote or just changed the bid or offer price so that it would cost me - so I had to phone up to get a decent quote. They obviously dont like people trading after hours too much!