Re: SkippyBing a navalised Typhoon
'Ignoring buddy-refuelling tanks, you mean?'
There's not a lot of fuel in buddy-buddy tanks*, normally the tanker also transfers fuel from it's internal tankage and as many external tanks they can hang off the thing. Ideally you want a tanker carrying as much fuel as possible, not launching one tanker per fighter as you'd soon run out of room on the boat.
There's also the issue of arrested landings where you need a tanker airborne to top up anyone who's delayed landing for whatever reason** otherwise you soon run out of aircraft as they typically only plan to have enough fuel for a couple of approaches, to minimise landing mass. For VSTOL aircraft this is less of a problem as they seem to get the landing right first time.
V-22 could work and would be an idea for F-35 as well, plus they'd make a more useful AEW platform. Alas I don't think the Treasury/Defence Logistics would be happy adding another type to the UK order of battle as they've spent the last few years trying to get us down to two fast jet and four helicopter platforms. Although it's still going to be a decade or so for that last one to pan out.
*In absolute terms there's quite a bit but not in fast jet terms and then half the tank is gubbins for transferring fuel.
**Either messing up their own approach a number of times, or someone else doing it and causing the recovery time to slip right.