Not for mileage as its basically a load of rubbish... all 3rd party info... e.g. if you write the mileage illegibly at the post office when buying tax, it will be registered with whatever the DVLA think you wrote and that can lead to ALL sorts of problems as ive had experience!
Well all the info is third party isnt it, no difference imo to a insurance company providing it and an auction house
A few years ago i was looking for a Mercedes Sprinter van , i hunted high and low , my budget was £8k , eventually i found one at a local dealer , it had 80,000miles and was in good nick but looked like it had recieved a blow over .
i asked the dealer about this and he siad it looked scruffy after the signwriting had been removed so they had it done , there was no sign of any accident damage .
There was some supporting documentation but not a lot as the dealer said it had been bought at auction
I did an HPI check and they informed me when the van was at auction it had 160,000 miles on it and had lost these in the few weeks between then and now.
I informed trading standards and gave a statement and they investigated the dealer , about 18months later he stood trial for 45 cases of clocking and deception (even though trading standards had dozens more ) and was found guilty , he got 18 months inside
He was a convicted car theif and was well known for clocking cars and vans having been caught in the past.
Best £40 i ever spent i reckon