Hello Richard,
The ‘proper’ history of this car and potential faults lies with the previous keeper, and does not lie with the pages of a stamped service book.
I don’t want to appear pessimistic, but simply to open the ‘in-love’ eyes, before committing. If I were in your situation, I would be attempting to contact the previous owner, and if the seller won’t help then it’s worth asking yourself why. Even the location of the last MOT can sometimes lead you to the owner.
If you have a ( understandable?) concern regarding this car using oil, then I would question why the seller? has serviced this car before finding a buyer. The don’t normally, and simply await a buyer, and then service it. Was it very low on oil before coming in to them, for example?
Doing homework is the key here.
Kind regards,
Gareth.