Hey that's a nice set of tyres you've got on your car there Mark. What's that? *gasp* No MO markings on the sidewall? It'd be a shame if you went to use it one day and the tyres were like pincushions filled with nails from an unknown source. Use MO tyres - you know it makes sense.So I see no reason to trust their opinion of MO tyres, and I do find their insurance invalidation claim bizarre and scaremongering, but at the same time serving to highlight what is really behind this brochure - getting more business.