We have (after a small bank loan) bought this tap:
http://www.grohe.co.uk/lib/1/tpi/1424493.pdf

The flexible hose tails end in G3/8 (=3/8" BSP I think) female
fittings which should connect to a nice male chrome fitting on the
wall (with an isolator valve). You see this type of thing in Europe a
lot, but not in the UK.

Does anyone know where I can buy them in the UK. I don't seem to be
able to find them anywhere.

many thanks,

Robert