It's the volunteers last week at the hill fort, and after seven weeks, just 12 of the original 17 remain. Theirfinal day-coinciding with the Celtic new year - will be a party to remember, but how will they readjust to the 21st century? Director Martin Pailthorpe ; Series producer Peter Firstbrook (S) (W) BBC BOOK: Surviving the Iron Age, available for £14.99 plus 99p P&P. Send a cheque, payable to RT Shop, to [address removed]Or call [number removed] (national rate).