Lets remember the time difference for sunrise from London to central Scotland is about 50 minutes, so even longer for farther north. If sunrise in London is 8.04 then it's 8.52 in Glasgow on the 1st of January. So if daylight5 saving was scrapped it would be near 10 am for sunrise in Scotland.
Scotland can have it's own time zone if BST doesn't suit... they're leaving the UK anyway...
I was in school in Scotland, Dunfermline, at that time and remember it well, morning break was also daybreak. The reason given was that the road accident rate went up sharply in the morning, but kids are driven to the gates today so that's not relevant now.
I'd sooner have the extra hour of daylight in the evening in December.