Came back from holiday and as expected the new sensors were here.
They're 'noname' brand, or unlabelled Bosch (who knows ?), purchased instead of originals due to the new plugs and wire tails which came with them, so that I can get back to work in the car tomorrow without having to waste time sourcing new plugs etc.
It took under an hour to splice, solder,wrap and seal the wire transplants.
Once the car started the codes were cleared, and by the time I drove to the nearest motorway the oil temp was warm enough for a regen to begin as soon as I hit the motorway. I've done a few stop/starts, and battery-off reset, no codes, all working fine. I'll monitor how often it regens and then consider doing a sensor adaptation if it needs it.
MPG reading has increased (better economy) back to where it previously was.
But another problem has occured since not using the car for a week, I guess due to some condensation, the electric windows are misbehaving, the two rears weren't working at all but now work fine, but the fronts are very intermittent. I can hear the window relays firing briefly as I drive along, so there's a source of CANbus noise somewhere.
All windows were in the down position this morning when I woke up, but the remote hasn't been touched. I'll have to monitor this.