Getting back on topic, sort of. Spoke with Insurers again today. Found out having a cherished plate is an "uninsured risk" therefore not covered by my policy.
To be fair I do have a voucher to replace the grandkids car seat when I get another car.
I also found out that this is where my (late) car will be sold.
https://www.copart.co.uk/vehicleFinderSearch?displayStr=[0 TO 9999999],[2018 TO 2022],Lexus&from=%2FvehicleFinder&searchCriteria={"query":["*"],"filter":{"VEHT":["vehicle_type_code:VEHTYPE_V"],"ODM":["%23OdometerReading:[0 TO 9999999]"],"YEAR":["%23LotYear:[2018 TO 2022]"],"MAKE":["lot_make_desc:\"LEXUS\""]},"searchName":"","watchListOnly":false,"freeFormSearch":false}
I went down a right rabbit hole looking to see what else there was. My (late) car isn't listed yet. Be interesting to see what it goes for.