1hr45min turn?! They should be able to do this in 75mins Max.
If you exclude the time to disembark and reboard ~300 passengers that'd leave you with about 20 minutes to clean and recater the aircraft. Local Israeli procedures do not allow refuelling with passengers onboard either so you'd struggle to refuel in that 15/20 minutes anyway. 1h45 sounds like a typical longhaul turnaround time. This isn't a cheap and cheerful low frills flight.
That is incorrect, you can refuel with pax on board at TLV as long as you have a fire truck on standby. We (El Al) often have the jetbridge removed while the fuel truck disconnects from the aircraft on our long haul flights
How many fire trucks are on standby for aircraft refuelling versus how many aircraft require refuelling? You may get special treatment on occassions as the home-based airline but as a foreign carrier we are told no refuelling with passengers onboard.
You mention that you have the jetbridge removed while the fuel truck disconnects - how many passengers can you board with the jetbridge removed?
At the carrier I work for we turn 789/772 and 77W I’m 75mins for a 4hr sector- 3class. It can be done for midhaul, and saves time to support crew duty limits.
We turn our 777s around in 1 hour/70 minutes on our Caribbean shuttles, but we don't do a full recatering and have some passengers that continue through without the need to disembark. To properly clean/re-cater and redress the cabin for a longhaul service it takes much longer. Despite being ~5 hours LHR-TLV receives the full long haul product, not a domestic/short haul service. We do LHR-DME as a day trip as a full long haul service and that's right on the FDP limits.
As the Virgin flights are geared towards connections it's all a moot point anyway - the aircraft sits on the ground at TLV for 11 hours in summer and 8 hours in winter.