It ain't often that I agree with Gonzo (is it matey?!) but he has made a good point all the way through this forum.
And anyhow, I personally don't want people wanting to do ATC beacause of the money. There are already too many starting to filter through and it shows in their attitude. Call me old fashioned but this job is a vocation and to do it well you've got to truly appreciate what everyone is trying to acheive. Not just appreciate your own pay cheque.
So if you ARE on 40k and you're not prepared to take a pay cut to do this, clear off beacause you're not cut out for it anyway
P7