Initially unsure which thermocouple to go for but Reece was extremely helpful and sorted it out with Thetford for me. Relatively easy to do (once you put back all the bits you didn't need to take off). Just a case of stove out, remove upper access panel on RHS of stove and you've got access to the valve end of the thermocouple, the oven end is easy enough. My original thermocouple didn't have the extra earth connection but there was a terminal for it. Obviously there are the gas and electrical connections to take care of when you remove and reinstall the oven.