Why does our hot and cold water lose pressure all the time, from reasonable flow to nothing, the hotter the hot water gets, and the longer the cold weater is on?

We need a more detailed description of your problem. Can you test your pressure, should be around 45 psi

Hiya.
Thanks for your reply.
No, I don't know how to test the pressure. This has been getting gradually worse over about a year.
The tap starts cold, getting warmer as it should, but the flow disappears (the hotter it gets) to nothing. First the bathroom sink hot tap went, then the cold followed (this dribbles when we're lucky), then the kitchen sink hot went (again works when we're lucky), now the bath hot tap is going.
It is our own house. I know we should have had it sorted out, but we can't afford a plumber. We've been living on next to nothing for well over a year.
Any help would be appreciated.
Gordon

Are you on a pump or city water? Regards, tom

Hiya speedball1
I don't know what you mean. We live in England. It's just on the mains.
Gordon