UK nursing

I was wondering on traveling nursing in London. my previous experince includes 2 yrs of ER and 2 yrs of MICU. I was looking to work in the UK for about 6 months or maybe more. I have never traveled overseas before and am looking for a lot of information.. I hate to say it but i am basically clueless here and looking for any helpful information.
so, my questions are
1. are there any US ICU or ER nurses out there who have worked in Great Britian? i have heard there are differences in drugs, calculations, and no resp therapist for vents? how I might prepare myself or is it a big culture shock?
2. I am looking for any suggestions on any good reliable agencies or suggestions on how i can look how reputable they are.
3. I would love any information on the logistics of the move.. renting the house, what to take, how much money they pay, ect..
4. would i save any money or will it all go to renting ?
5. do they leave time for extra travel oportunites?
6. easier to find a ER or ICU job? pay difference?
Would appreciate any input or information