OK I will get the number for you, but that was someone for the timing belt as they specialise in diesel engines so not a general mechanic.
However, I will make another recommendation - join Lancashire Land Rover Club on Facebook. Lots of helpful people from around our area that know local places to use.
Oh, and if you are buying stuff for the 300tdi, be aware of subtle differences between the Disco and Defender units. I have a spare Disco top rad hose for this very reason. I also bought a rad frame that was for a Disco/Defender that in actual fact was suited to the Disco - thankfully it splits into four and the piece rotted out on my frame was the same as the Disco.