after googling I have found loads of links to external pond pumps in the
states but nothing here in the UK
anyone got any bookmarks they can share?

I have a big pond (200 sq m) and I want a decent pump to run a stream.

The pond is a long way from the house and I would rather keep the pump
nearer the head of the stream bed and house by running water pipe than mains
cables

are there such things as low voltage external pumps as with three kids that
would be even better!