Welcome to the forum Ian, you'll find the members on here are a friendly and helpful bunch :)
When you say service history, I'm assuming it's not full?
Obviously check that all electronic items work as some of them can be costly to fix. This also goes for the air con as compressors etc aren't cheap to replace.
If the car is manual check for a heavy clutch or if it's slipping as you'll have to factor in a new clutch in the near future. If it's auto make sure the gears change smoothly in auto and manual mode as any faults can be expensive to fix.
Here's a YouTube video which may help:
Hope I've helped :)
Cheers
Steve