It's 10 years old so I think so... (not really a car person as you can tell). Thanks for the comprehensive answer which I could understand, I shall mull on what to do...

So are you saying I can't put 2 Wranglers on back and 2 Synchrone on front?

I'm in deepest Kent so bit too far to trek up to Nottingham, but thanks for the offer!

OK I'm a girl and don't know much about cars, I expect garages to advise me correctly, luckily after doing a few Google searches I realise they don't! I have a Freelander with 4 Synchrone tyres, and one Good Year Wrangler spare. Managed to drive a flint through the edge of Synchrone back tyre...