There are currently no plans to fly F-35 at low level at all
I think getting one to fly should be the first challenge 
They flew here from the US, IIRC.
.. Unless that refuelling probe was actually a cunningly disguised aerotow rope. 
I'm not sure that folding the wings and stuffing it into the back of a C17 counts as flying 
9 have arrived in the UK. 4 in June last year, and another 5 last August. All 9 flew under their own power non-stop from MCAS Beaufort in South Carolina, obviously escorted and refuelled en-route by RAF (Voyager) Tankers. All 9 are currently operated by 617 Sqn. There are rumours of another 5 coming across in the next month or two to start the formation of the second squadron (201 Sqn). The RAF also have another 3 or 4 permenetly stationed in the USA for test and development work. It's uncertain if these 3/4 will ever be delivered to the UK since they are early development aircraft, and of a different standard to the ones delivered.
The reason only 3 were in the UK last week was that 617 Sqn had deployed to Cyprus with 6 jets in March, and these have been used in Op Schader missions over Syria, and joint exercises with US and Israeli F-35's. 4 of the jets returned to the UK today, whilst the other 2 have stopped off in Italy for excercises with Italian F35A's and Typhoons. So as of today there are 7 jets at RAF Marham.
If you want to see one (or hopefully more), then they are due to do flypasts at both Yeovilton Air Day (Sat 13th July) and RAF Fairford the following weekend (Fri 19th - Sun 21st). As of yet, I don't think any have landed in the UK away from RAF Marham, though maybe now they're back from Cyprus they'll start appearing a bit more often.