Since fitting a new shower upstairs it seems the hot water doesn't want to run.
Shower works but goes hot for about 5 minutes then cold for about 2 minutes. This seems to be getting worse.

The hot water downstairs does not seem to work at all unless I turn the boiler off and on. The water then works for about 20ish seconds (about enough time to fill up a washing up bowl)

The taps in the down stairs toilet sem to be getting progressivly worse as well as the shower.

Had a plummber in and was told it is because there are too many bendy taps effecting the water flow (doesn't pour out but comes out fast enough for me) he didn't answer the question of why the hot water is not working.

Unsure if the radiators are effected as not had them on all summer.

Want to get tthis fixed before there is no hot water at all :(

Any help

If you didn't have these problems before new shower was put in than I would concentrate on the new shower installation. Perhaps, plumber crossed hot & cold lines which would affect hot water delivery to the rest of the house. Can you be more specific as to what was done with that new shower ? Back to you. Milo