So both my rad fans wouldn't run on low speed due to the resistors being knackered.
I simply refused to pay £67 per side to solve the issue so decided to find an alternative way to fix them.
After a bit of looking around I bought a couple of high quality resistors and made up my own harness. Removed the old resistors today and fitted my new harnesses whilst I was fitting new condensers and I now have fully working rad fans again with two speeds
Grand total cost? £4.62
I'm going to run the car for a bit and if I don't get any issues I will consider making up kits for people for a small fee if there's enough interest
The new resistors I have used are far superior to the factory ones and they also have a large heat sink on them which should help stop them from dying as easily as the standard ones.