Many F2s are way to busy to even attempt to sit the exams. DDs friend had a go but she is luck as she is currently in placement at a small and surprisingly quiet hospital. She does not except to pass. She is a nice, charming, working class grammar school girl, the first of her family to go to University, who wants to stay and work in the area she grew up in. She will not have the extensive support and contacts needed to beat a very competitive international field.
DD is just too busy. Her previous placement was in a notoriously frantic area, lots of nights, lots of very sick patients, and a fair commute from where she lives. Her idea was to do what many do, which is essentially take an F3. A regular hours locum job where she had time to learn more about her chosen specialisation and to study. My cousin's daughter became a Clinical Teaching Fellow, lived at home for a couple of years with her fiance. They both studied hard, and they both did well enough get on training, her as a GP and him in his chosen speciality. Living at home also meant they were able to save enough for a deposits.
In those days such CTF/locum posts were not open to international competition and attracting hundreds if not thousands of applicants, and PAs didn't really exist.
So yes you might sit the exams as an F2 but you probably won't pass them with sufficient marks. And if you don't, and don't fancy driving an Uber, then Australia is probably your only option.
DD has yet to apply, but applying against current competition in the UK will be too time consuming and the odds too long, so is only likely to try Australia. (There are two locum jobs coming up in her preferred speciality in her deanery, but neither are particular appealing and not only will she be competing against everyone else in her deanery in her year but those from previous years who have failed to get a training position, plus those in the rest of the uk who want to go into that speciality and who haven't yet landed training positions, plus all those from the rest of the world who want to have a crack at a UK training position so are keen to get some NHS experience.)
The simple solution is to allow young doctors to apply for PA posts. These are the ones that used to be filled by doctors but are now given to PAs. Or set up an agency designed to place UK trained doctors in the same way that overseas agencies work to place overseas doctors within the NHS. And change selection criteria so that it becomes merit based,giving weight to good NHS experience, rather than how many articles you have had published in the Phuket Journal of medicine.
I have no idea whether, when she is there, DD will be able to apply for Australian training places or whether she will have to complete a residence requirement. The current idea is for her to study for the UK exams and return once she has passed.