Ok, Helen, Frank and Elsie aren't coming, so I have room in the car for one, possibly two others (I have a Fiesta, so it will be tight), leaving early doors Saturday morning. Petrol rates are negotiable, but liable to change. I guess a full tank will see us there and back so it will be in the region of £10-15 each. (£10 on one 70mph tank, £15 for a slightly more enthusiastic tank. Based on 4people sharing. 5people, although cramped will be cheaper.).
I also have a room in some hotel in Bristol, which Helen had booked. There will definately be one space spare on the sofa bed. Cost of room is £52/4people = £13. It is only for the saturday night. How it will work with the hotel is a bit of a stumper - it is for two adults, two under17s. I guess I'll be masquerading as Miss H. Sell, as the room is in her name, but the others I can't see being a ploblem as no other names were given.