"Roger Moss" "rwm2 [at] rwmoss.gotadsl.co.uk" wrote in message
...

As an alternative, can one install a booster pump for the cold supply and
an ordinary electric shower? Or will a booster pump seize up if the hot
water side is running dry?

We've got a pump which does that - designed for just that I think. Works
fine, if a bit noisy. I'd go for a pumped mixer or combi if I had the choice
though - instant electric showers are a bit underpowered.

cheers,
clive