In reply to Hans:
I'm sorry to say a silent partner is no good for working routes. It is the kind of thing that will save your life, but is a right pain if you fall a lot and almost impossible to use on routes at your limit.
(Note, I'm assuming that by working a route you mean falling off a lot on something hard, not just doing laps.)
Probably the only way to work a multi pitch is from the top down. i.e. rap the top pitch, practice it on self belayed top rope, rap the next pitch and repeat. This requires 2 ropes. 2 ropes = 120m and there aren't many multi pitch sports routes in the UK longer than this, so you might be able to rig it from top to bottom with a re-belay at a bolt at 60m. (Or many you aren't thinking just UK?)
A lot of people use a grigri with a backup knot to work routes on top rope as it is easy to go up and down so you can practice the crux many times, then use a pair of mini traxions to do the whole pitch clean (on top rope) once they have it dialled.
An alternative is to join a climbing club or two - this should generate all the partners you need.