Thanks to all of you. RT did quite a lot of work before sale - it was a commission sale. 5 new tyres, new windscreen pillars, driver seat squab replaced, and service plus MOT. I have checked all the papers I have and can see the last gearbox and diff oil change was in 2022, at 25,000 miles. The coolant looks as if is fresh out of the bottle. So I will arrange the MOT and consider all the rest.