What causes low water pressure in my home?

Start with the free checks. Is the internal stopcock fully open? It's remarkably common for one to have been left half-shut after a job, and half-shut looks exactly like low pressure. The same goes for the small isolation valves under basins and behind loos.

If it's one outlet, unscrew the aerator on the end of the tap and look at it. They clog, they cost pennies, and clearing one often fixes a tap people had given up on. Worth saying, though: in a hard-water town the answer would be limescale — here it isn't. Macclesfield's water is soft, so what you'll usually find in an aerator is grit and sediment from the main rather than a crust of scale.

If it's the whole house and it came on gradually, suspect the supply pipe itself. This is the Macclesfield answer more often than people expect, because so much of the town centre is pre-1919: a Victorian house may still be fed by the pipe it was built with, and old lead or narrow iron closes up over the decades until the flow behind it is a fraction of what a modern shower expects. It's also worth finding out whether your supply is shared — one pipe feeding two or three terraced houses off a common stop tap is a normal Victorian arrangement, and it means your neighbour running a bath is your problem too.

If it happened suddenly, suspect a valve, a leak or the supply, and check the meter to rule the leak out. And if it's only ever bad at seven in the morning, that's demand on the local network — a United Utilities question rather than a plumbing one.