May take an hour to get to Rusper but not a problem as I'll call Paul on the way to give him an ETA as he only lives round the corner from Rusper.
Nothing's changed from the original ride though .Blue Peter Version:
If you don't
know that you'll be happy with your lights' illumination descending at say 25mph on an unlit lane, then test them. If they don't provide enough light then buy/borrow some that do. As a general rule dynamo or rechargables will be okay, clip-on lights that are okay for commuting won't be good enough.
Pace will be reasonable which for night will be about 17s to Brighton, use any bike you like if you can ride it to Brighton at night at that speed. Speed as always is only a guide to effort though not an exact, it depends what the wind's like.