There are quite a few freight operators in the UK and around europe, try looking at the following:
Channel Express - Bournemouth (freight and now PAX)
Emerald Airways - Liverpool
BAC Express - Horley nr. Gatwick
Titan - Stansted (Pax and Freight)
Heavylift - Stansted (frieght and now PAX)
Streamline - Exeter
Air Atlantique - Coventry
All UK freight operators require the same qualifications as PAX operators and there is no difference in the type ratings etc. The only differences is that the deadlines are more critical, the flying is all at night and the aircraft are generally not quite as shiny as their PAX carrying brethren. It's not as glamourous being a freight dog but you don't have to worry about PAX comfort and you don't have air witches to contend with.
Hope that helps
Boxjockey