No worries mate.
As Danny said above 5 years or 72k which ever is first, don't be fobbed off with its only done 50k so it'll be right (if its original belt). They can perish/crack with age. If it fails can be big bills time £££.
If its due take it to one of the specialists on here, there are a few depending on where you are in country.
That's plenty to get you in a decent 172.
Also when you get chance, pay the £12 to become a member. It'll pay for itself in no time, and will give you access to all the Traders sections on here