Hello.
An update from me - after contacting the dealer, the company owner came back to me with an offer to replace the vehicle with a TD5 from 2001. After reviewing that Landy, I decided to accept under various conditions. I was actually impressed with the call with the owner and the care afterwards. It came with a cash refund as compensation too. The underbelly was videod as it was being serviced and sent to me and 'my' mechanic, who was satisfied.
The new Landy arrived last week and I took it to the garage where the mechanic put it up on ramps. The underside is in great condition. The only problem he spotted was that the back door was replaced with a pretty cheap one and the spare wheel was pulling already on the hinges. I'm getting that fixed myself and the company owner agreed to compensate me.
Overall I'm impressed with the company owner and satisfied that the Landy replacement will do me very nicely. I am grateful to all the advice here. One thing - if that replacement had been dodgy I'd have then been able to request the full refund. As it stands, this has turned out better than it could have I reckon.
Cheers.
Liam