I had a junior colleague when I was working in London who had a serious gf in NYC. He'd fly out every Friday on the 8pm and arrive back Monday on the redeye. This went on for about 18 months until he was fired. Not sire if there was any connection between grumpy Mondays and his performance...
The problem for the OP is that his commute is the wrong way round to take advantage of the time change.