Wow wasn't that bad, the previous owner (from this forum) assumed the tyres were fine based on the outer and inner tread, as did I when I collected the car. He missed it, I missed it, Lexus missed it but Halfords MOT found it 😁 😁. Now I have lots of tyres, 4 x summer, 4 x winter. I haven't noticed any inner wear but I'm only pottering around my village most of the time doing 30. If I notice the wear again these USRS could be well worth the spend.