Home DIY

Options are:
Run a combi boiler= mains pressure at all outlets
Pros: good pressure, maximise storage
Cons: pressure drops when two or more outlets open
Run a pumped gravity system (sounds like this is what you have)
Pros: good pressure
Cons: noisy, more things to go wrong
Run an unvented cylinder
Pros: good pressure with multiple outlets open
Cons: takes up room, overkill for properties with one bathroom

We have one, it's a noisy fucker but works fine, we only turn it on for showers because the baby's room is on the other side of the boiler cupboard.

D