I'm a FAA flight instructor in California, so I had to pick a Distance Learning package. I looked on Internet and only found 3 serious schools with good reputation in the UK : Oxford, Atlantic Flight Training and Bristol. I picked AFT in Coventry as being the cheapest (1,795) and for being owned by an Airline, so no bankrupcy at least for a little while.
It worked out for me, done in 7 months (Dec/2002-June/2003)...
Good luck and Let me know if I can help,
PS: And again, is not that hard ! I got a first pass in all examinations studying from the other side of the Earth ...