Thank you both very much.
Softus - not sure if the tank is gravity fed. However its on the first floor, together with the pump, and the boiler is on the ground floor. Pressure can be increased by opening a screw with a screwdriver - there is a small silver flexible pipe about 12" long which...
I am thoroughly fed up... any thoughts appreciated.
This evening I noticed for the first time that a skirting board on an internal wall on the ground floor of a house had seperated from the wall. It was fine a week ago. A quick look around the other side of the internal wall (i.e. another...