Arrived at manchester for the LGW flight and was horribly early...... I asked the nice Tkt chap if there was any possibility of getting on earlier flight; I was booked in disc. econ...(V class) He asked me if I had been delayed on the flight up.... which I had... he changed tkt on to an almost full aircraft... Booking class "O"... and seat 1D!!!! I waited with baited breath to see if I would get T.P's and miles... 25% Miles posted.... NO T'ps... which is only fair I suppose...!! Help like this keeps me flying B.A. when things change.