Found the filling loop, but had no joy sorting it. Dunno if I'm doing it right tbh, so I'm just gonna have to call a technician out which I really cant afford. 
The filling loop may be in your old airing cupboard,one end of the loop goes onto the cold water inlet and the other end goes onto the pipe that feeds the heating system,there should also be a gauge next to it which tells you the pressure in the system,connect both ends the turn the valve on and fill untill the gauge reads 1-1.5 bar.
,SORRY IGNORE WHAT I HAVE JUST SAID I CAN SEE YOUR BOILER IS IN THE AIRING CUPBOARD
my boiler is in the loft but the filling loop is in the airing cupboard.
