Hi - I think you'll find that Aviance, Servisair/Globe Ground and Groundstar/Swissport will be more than happy to give you an interview since you have a frozen ATPL. When I did it, I even had a choice of handling company. The interviews I got were basically, what's your date of birth, do you live in reasonable commuting distance to the airport, are you ready to work early/late shifts for £6/hr (£9/hr for overtime)? Yes? OK, then please sign on the dotted line!
More info, PM me mate.