Elsabeth, from reading your posts, I think you would love the London dungeon, if you get some free time! [ame]http://en.wikipedia.org/wiki/London_Dungeon[/ame]
Also, you may want to bring an extra blanket. When I went there, I loved it, but it seemed like they were not too big on comfort or accomidations like we are in the US.
Don't forget to bring a converter plug, their electric outlets are different than ours so you have to have a converter if you need to plug anything in. (curling iron, hair dryer)
It's not exact, but an easy way to tell how much something is going to cost is to double the price. one pound=$2.00
For example, if a Dr. Pepper costs one pound fifty pence, expect that it will translate to around $3.00
Everything there is going to cost close to double what you would pay here. It is very expensive.
The hotels are expensive and nothing to write home about. For $200 I got a hotel that wasn't even as good as a motel 6 here.
Some places will not accept credit cards. I went to eat at a nice, upscale place and they refused to take a credit card, I had to go to the atm and get cash.
The cash machines over there will cost you about $5.00 each time you make a withdraw.
The traffic in London is horrible, I was lucky to have a couple of friends over there to do the driving, I would not advise you to drive.
When they say I'm pissed over there, it means that they are drunk, not angry. lol
The person that said the food was horrible is right. Even at the mcdonalds, they don't use sauce and if you ask for mustard, katsup, or mayo, they will say no.
The fish and chips was the best thing I had. The pizza was gross, they eat ALOT of Asian food there, which I was suprized by, but it is aweful.
It is hard to get used to the time change. Scedule at least a day or two to sleep and get adjusted.
I hope this helps some!