In reply to Nobby the sheep:
Lots of snow at the moment. Mainly powder, except on popular paths (such as the one up Scafell Pike), which are icy. It's due to warm up at the weekend, and possibly then cool down again, in which case I'd expect widespread ice.
It's up to you but I'd take an axe and crampons. Obviously this advice may change depending on the weather between now and then.
Too many variables to estimate a time. Not just your fitness, but also the conditions - I went for a run on Saturday, and averaged slower than I normally do when walking, due to deep powder.