I'm starting with London Midland next week. I was offered on the 6th of November, and start next monday, the 25th. That's over three months!! However the references were done pretty quickly, once I reminded them they hadn't been done!!! Bear in mind that LM have several HUGE recruiting campaigns, which of course in turn means several HUGE intakes, which requires the HR staff to be on the ball, all of the time. It can take a while for the correct wheels to turn. Sit patiently, they WILL eventually get sorted out.