Thanks for your reply. The machine is built into our cupboards so it's awkward to pull it out. I actually managed to disconnect the hose that leads to the pump although the clamp was in such an awkward position my hands are now covered in cuts and scratches from trying to get a pair of pliers in there. From there I had a great view of the blockage, a mound of lint and 8 hair grips! My wife doesn't use them so that was a nice leaving present from the previous owners. All cleaned out, re-assembled and a wash is now running! I wouldn't have known what to do without this forum, thanks!