Powersteering pump developed a leak and was run dry for a while so I took it apart to see what the problem was.
The front seal looked shagged and where the main shaft runs through the housing its somehow managed to score the housing quite badly with deep grooves, the shaft still spins nicely though, would a new front seal fix it or is the chewed housing the problem.
EDIT: Tried to get a pic of the scoring but camera is crap