Quote Originally Posted by shack View Post
I'd be having a good look at the relays under the driver's seat, poor contacts on these can cause all the problems you listed,
I.e glow plugs, starter motor, fuel pump etc.....I'd be checking these first on a defender, they are a known issue, especially if you like wading.
Cheers! Will have a good look under there now. Wish I posted in here before taking it to the mechanic. Paid for a whole new fuel pump.