I’m in the VIN range and have had them checked, all Ok, and on that basis would probably be covered if they did go.

I’m working on the assumption that LR won’t change them as a matter of course if there is no cracking so for safety sake I have looked into prices. They seem to be about £650+vat a side for the bit….. a couple of hours on that for fitting. There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
2010 LR D4 Commercial 2.7 TDV6

I would get LR to change them both.

I took mine in (as it's in the VIN range) and one was visibly cracked. They changed both anyway.

Chris. L405 - 4.4SDV8 Vogue
P38 - 4.6V8 HSE
Land Rover series IIA V8

"I’m working on the assumption that LR won’t change them as a matter of course if there is no cracking"
I don't think this is the case, I was told by a normally very reliable JLR gossip that the problem was with clearly identified batches of parts. from this some VIN numbers WOULD have the suspect parts fitted, some VIN numbers would NOT have the parts fitted and some MIGHT have the parts fitted. He reckoned that the "inspection" involved confirming which parts were fitted to any given car, the suspect parts would be changed and the others would be checked and changed if required.
This seemed to be the case as he told me just from the VIN that my 2014 car would get both sides changed and this was the case even though there were no signs of cracking.