Indeed. He has, typically, been starting around 5 am. That's just under an hour before sunrise now. All he has to do is keep on starting an hour before sunrise and the clock doesn't enter into it, other than perhaps opening/closing times of breakfast venues. Jaded's point about school run/rush hour times is relevant as normally Steve has melted into the countryside by that time* and can cycle on roads where that will make little difference. However, if he keeps on gearing his starting time to a little before sunrise I don't think they will affect him at all. Once Steve gets some warmer weather then I think his mornings, what with the dawn chorus, will be an absolute delight.
*There is a very special South Essex rush hour which is geared to the charging times for the Dartford Bridge/Tunnel. It's free before 6 am and once, when I was travelling at stupid o'clock to my daughter's place, I was very surprised by 5.30 am tailbacks on the A13. That is what I attributed them to. Steve, of course, will be steering well clear of such nonsense.