Depends how far north you are though, and it is a double edged sword.
Here in Glasgow, in late June, in stays lighter in the evenings for a while longer than, say, in Portsmouth: I've been in Orkney in late June when it gets more dusk than dark, and even then just for a few hours.
However, come late-December here in Glasgow, it would stay dark until around 9.30am (and nearer 10am in northern Scotland) unless the clocks reverted back to GMT each autumn.