There are two 'T's after the pump, the first the pump is on the right side, downwards there is a pipe with a red valve on it, which seems to go to the downstairs rads. Towards the left it then goes on to another 'T', upwards into the loft somewhere and towards the left of that T into the hot...
Hi, please be gentle, I think I know the answer is 'no' already, but I recently moved into a place with a rather old central heating system. There are controls to switch the heating on, off or timed and there is a thermostat on the boiler (not anywhere else) - the boiler is a Glow Worm...