Thanks for all that, I think the answer is no they won't fit so I need to look for a DS with 18" or 19" The reason for my dislike of 20" wheels is all about pot holes and also off road capability. I was following a my daughter a couple of years ago, she had a car with low profile tyres and hit a pothole and wrecked the tyre and wheel. I went over the same pothole in the FL2 with 18" wheels and hardly noticed it. 3 x FL1 2 manual + 1 auto
5 x FL2 4 manual + 1 auto
Now Discovery Sport P250 MHEV SE

FL2 wheels will fit a DS, but you need spacers to avoid fouling the shocks. This has been covered a lot on either this or the DS forum. DS and Evoque wheels are interchangeable and will also fit FL2. E-Pace wheels will also fit, but they won't take LR centres, so you need to keep the Jag ones or have them custom made.
As an aside, I have just sold my Evoque, so I have two sets of wheels with good winter tyres - 18" early Evoque and 19" E-Pace. Both with TPMS. I was going to advertise them in the autumn, but PM me if you want more details!
The poster above is correct - genuine JLR TPMS valves don't need any calibration. Plug and play. Ex AA Series III LWB Safari - Gone
300TDi Disco (bought new - terrible car) sent back after 18 months
Freelander 1 Estate - leased, given back at end of lease
200TDi Disco (bought from a mate with 100,000 on the clock) - Gone
Disco 2 TD5 - sold and exported to France
FR2 TD4 GS - Gone
FR2 SD4 HSE - Now changed for a DS
New model ex-demo Evoque S 180 in white
Unable to order a new DS, so gave up. Now have a Volvo S90 Recharge.