Following up to Christian McArdle

It depends what you mean by "shower". An electric shower is usually 32-45A.
Perhaps you mean a shower pump on its own circuit?

Old 3K unit it seems, I didnt realize how puny it was by modern
standards!

Personally, 60A would be fine, provided you have only one of an electric
cooker and electric shower.

The cooker will have two e. ovens (but there is only puny-shower)
and gas hobs (and a gas oven) wife has chosen a pretty fancy
cooker. (but 30A not 45A).
--
Mike Reid
Walk-eat-photos UK "http://www.fellwalk.co.uk" -- you can email us@ this site
Walk-eat-photos Spain "http://www.fell-walker.co.uk" -- dontuse@ all, it's a spamtrap