I had similar thoughts as Glojo....except I took even a more basic view. With a grand total of four....as in a finger four formation if all were up at the same time...and an availibility rate in the 70's...errr...now we are at three....and as the basic formation is two....leaving one either on the ground or overhead acting as a sentinel...to cover a very large area 24 hours a day....7 days a week. Now I know the Typyhoon is supposed to be the Cat's Hindend and all...and the RAF masters of their realm....but let's be real here.
Add in some of the options previously mentioned....and I can see it being a bit difficult for the force extant to handle a single mass raid which saturates the home boys....then followed up by an immediate second raid that puts paid to the runway and assorted support facilities.
The Enemy is thinking ahead just as our side is doing!
Granted all plans are effective right up to the instant contact with the opposing force takes place....then it falls back to who is both the best and the luckiest.