Suggest you do a search in the other forums but :
Bases : 777/Airbus - LHR
737 - LGW
People with > 2000 hours including a significant amount of jet time likely to get 777.
Hold pool time was a week or less, now a bit longer by all accounts ie. maybe a couple of months or more.
Salary - Year 1 about 43000 basic plus about 15000 flight pay.