Was browsing my car’s online service history and stumbled upon this:

N785 – ENGINE COOLANT PIPE - RENEW

Affected vehicles will require replacement of a coolant system plastic elbow and a turbocharger coolant feed pipe which can both be damaged due to engine overheating which can result from a water pump drive belt concern.

Seems to be a PHEV thing only.

Nothing in the post yet from JLR 2018 P400e AB LWB

Yes, received a letter from the importer, a Final Destination scenario, the belt fails, then the pump, the plastic elbow, the turbocharger is on fire, then the engine, the car, the garage, the city...
Called the dealer and they said it's a 2 hour job, but the part is on backorder (and that's why they didn't call), but there is no risk, etc... I asked: will you replace the belt too? "No, just the plastic elbow" was their reply...