Odd! The configurator page I can see at
JAGUAR XE
buildyour.jaguar.co.uk
still shows the HSE P250 as available to build and order.
You're quite right! I think there was a Sunday night IT update going on that ran into Monday morning. Weird. I am quite sure it was not there, as some other options were missing too on the models that were still there.
That's one issue resolved, I guess. Doesn't help on your actual delivery, however.
I‘ve been thinking about replacing my existing XE since the middle of last year but didn’t want a diesel or 4WD, so when the P250 was announced as part of the MY23 line up in May with a 6 month delivery, I took the plunge.
P250 RWD is a good package, but then I am biased

I'd perhaps have done the same had I been in market. Instead, I put the money into my pension fund....the dull things we have to do sometimes!
Given the very low volume of actual XE deliveries now, the situation looks less than brilliant, sadly. I really don't want to believe that only 348 were delivered in the last quarter in Europe (the carsalesbase data), but if so that's an end game.