In reply to Brendan H:
Unless you have a pile of cash to lean on get signed up with an agency straight away - back ground checks for being out of the country, CRB or whatever they call it these days, references will likely take months if you factor in NHS HR dept insistence of employing non self starters / windowlickers. Make sure you have a c.v. that sells your skills and additional qualifications - NHS trusts are notorious for trying to not pay you for non NHS experience even if it outstrips whatever experience you would of had working for them. Bottom line, nurses are in short supply and ones with solid experience and qualifications are sought after, demand parity on the pay scale for the years you've been working.
D