Dude you asked:
Also, isn't the RAF very strict about touching down promptly? Not sure myself, not a RAF type.
No- its the US navy who really need you to land on the mark - miss it and you miss the deck - for the brits, I guess its a different ball game in a harrier
Wence I was in the RAF (VR), I flew into Greenham Common, in a bulldog quite a few times. To save 5 min taxing, we would land half way along the runway!
I think landing on the numbers is fine IF you have a short field AND you need max distance ahead of you to safely stop. Otherwise pick a spot with a reasonable saftey balance of distance to stop ahead and distance below you if the engine stops 1st! If you want to practice you precision that’s great - then see how close to your nominated spot you can get.