I recently took my car (2017 Citroen C3 Picasso) to my local dealers for a slow puncture problem. I get free puncture repairs with my service plan. They diagnosed a split in the sidewall, which meant I needed a new tyre. They offered to fit a Nexen, but as I have Michelin Cross Climates on all four wheels it would mean having two mismatched tyres on one axle. So I asked if they could replace it with the same, i.e. another Michelin. The tyre they fitted was a Michelin Primacy 4. This means there is now a mismatched tread pattern on the two front wheels. Is this legal? And could it affect the handling? Also the tyre they fitted has a speed rating of V, the others are a T, what difference will the speed rating make to the handling (if anything)?