As I’m using the Defender for camping, and I live in the UK, I decided I wanted to fit some level of heating. The diesel heaters off eBay have a strong community on Facebook for support/mods/upgrades so I decided that for £110 delivered next day, a 5kW heater was the way forward.
I plan to install this properly before my next big trip, but for now it’ll just be fitted to the 2nd row footwell. I will be plumbing this into the main diesel tank as I don’t really want to have to worry about filling up a 2nd tank. I purchased from Butler Technik a Fuel Stand Pipe for TD5 (https://www.ebay.co.uk/itm/Eberspacher-or-Webasto-Land-Rover-Defender-TD5-Aux-Fuel-Stand-pipe-20300) which will do the job perfectly, and then I’ll just run the supplied pipe/pump combo from there.