That all sounds good Dominic - from experience with V6 Lambda sensors (Rover with the Honda engine, not Jag) i would be very tempted to get the sensors on the other bank done too.
Because of the age/mileage thing, they do tend to fail close to each other so it's preventing a future breakdown, not to mention it should make the engine livelier and hopefully more fuel efficient.
Will be interested to learn your first impressions of driving it with the work done!
Little anecdote for your from my Rover 827 Coupe - V6 with one Lambda per bank. During the MoT test, the CO reading suddenly started climbing from 0.1% (easy pass) to way past 9% (definitely a fail!) and the test was failed and i took the car home to investigate the cause.
Halfway home (it was about 40 minutes drive home so ~45 minutes after the CO climbed on the emissions tester) the EML came on which meant i then had a code to read. Nice and easy on that car, look under the drivers seat and count the long and short flashes of the red LED on the ECU and look up the meaning.
Turned out to be the rear bank Lambda sensor so i ordered a pair and renewed both front and rear bank sensors. Removed the caat and soaked it overnight in hot water and half a dozen or so dishwasher tablets. Rinsed it with water the next day, blew it dry with the airline and gave the outside a squirt from a satin black rattle can and refitted it.
On the re-test, the CO came up at 0.00% so was a pass but the tester was wandering around muttering "Why can i smell lemons?" - if only he knew but it cleaned the cat out nicely! 😛