Below 100,000 miles qualifies as low mileage for a diesel? Coz that's about the time you start having major problems that need a lot of money to fix or replace. I've just been badly burned with a van I've just bought - I'm making the switch from trad to WFP, bought my first van (45000 miles, confirmed by the DVLA before you ask) and it has spent more time being inspected and fixed with major problems than I've had it on my drive preparing it and waterproofing it for the tank. I'm asking for my money back as it's not fit for purpose and have been refused! That's the short version and it looks like it'll go to court at some point but right now, I need to get a(nother) van but shied away from anything above 80,000 miles because that's when things are more likely to go wrong. And yes, I am aware of the irony!
Klean that's roughly my budget, maybe a bit more, maybe a bit less, have to see what's down my way (Surrey), or I have family in Banbury as an alternative, but once bitten etc (I hate cliches but that seemed very apt!)