Why do the tyres on my Jaguar XF generate so much road noise?

Please could you advise me in respect of an issue I have with my 14,000 mile 2010 Jaguar XF on 245/45 R18 Pirelli P Zero tyres, pressures 35PSI. These tyres are very noisy in the speed range 30-80mph, being worst at 40mph - 50mph. Noise occurs on most road surfaces (French motorways/local roads). As the warranty expires in October, and if the problem is not common to this car, could you please advise if you think it should be investigated by the dealer.

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It is simply what happens when wide, low profile tyres become more than half worn. More of the tyre touches the road surface. And that's why the tyre noise is greater.
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