Depends on the aircraft but on some shorter flights you only get a wider seat.
You sure? That’s what they do in Club Europe, but WTP is totally different – it was the old Club Class seats before they went to flat beds. Different part of the cabin.
They’ve managed to divide economy into a sub-section?!
As above – good way of re-using the old old Club Class seats!
I’m not sure it’s vastly worthwhile, if it was a small premium I’d go for it, but generally World Traveller is pretty good unless you’re extremely tall/fat. I’ve done about half a dozen return trips to SFO in WT (plus one in WTP, 1 in club and 2 in First) and like I say I’d not pay a huge premium to upgrade.
The BA flights to Las Vegas always used to be 777s, which are set up 2-5-2 in WT anyway – so as a couple you can have window/aisle. Get the exit/bulkhead row and you’ve got plenty of leg room.
SFO-LHR will be a 744, so they’re 3-4-3, whilst WTP is 2-3-2 (IIRC), so there is the chance for more privacy.
On the other hand… it’s your honeymoon. Go mental.