The boiler is a Glowworm 30ci plus, which has a 5 litre store.
If I turn on the shower or taps at a low flow rate (hot), then I get water for a bit, and then the flow cuts off. There's no problem with higher flow rates. Curiously the monobloc mixer I just installed in the bathroom doesn't appear to have this problem.
Any ideas? Is it a case of 'they all do that sir'?
Ben