Xenos, where are you coming from? The reason I ask is that it's possible (just possible) that a couple of friends will be driving up with a van, and picking me up en route. If you are willing to contribute to the petrol fund, they may be able to pick you up too. It depends where you are. The advantage is that it's much quicker by road than by train into London than back out again, so you can get up later.
No guarantees yet, these friends are notoriously bad at planning ahead, last time they said they would be coming then dropped out