Where should a Crit'Air sticker be placed?

Official advice is to place the French Crit'Air sticker on the right side of vehicle windscreen but for most UK cars this will impinge more than 40mm into zone B and won't that therefore be an MoT failure?

Is mixing tyre brands safe?

I have just got a BMW X1 M Sport which has mixed tyres. It has 3 Pirelli 225/50R18 99W and the nearside front is a LingLong 225/50R18 95V. Is it safe to leave it like this?

Can I park my car on the public road when it is SORN?

Is there a restriction to where you can store your car after a SORN declaration? For example does it have to be on private property like driveway or garage or can it be parked on public street if my house...

Are wheelarch lights legal?

Is it legal to drive a car with lights in the wheel arches and are there any colour restrictions for those lights?