Just got a puncture today in the front left, and took my car to get it replaced, discovered that the tyre was a different one from the other three!! (I got the car from a colleague who left with the car 4 months old).
The aforementioned tyre was 225/40, with the others 240/40. Wondering if this will have caused any issues? Now got a new set of 240/40 conti sports on there now.
A side issue, discovered that the locking wheel nut 'key' can stay on the space saver tyre for 4 miles at 50mph without falling off