As always poetryandwine is right.
F1 is a silly place from which to make comparisons. The contract was revised substantially in about 2015, to make life far easier. Shorter working hours, less responsibility, more support and dedicated study time.
However health is a devolved issue so this is only England. The other component countries of the UK have their own contracts. DD is not in England, but in a poorer bit of the UK which cannot afford the English F1 contract so still used the 2005 one. So longer hours including more nights and weekends, more responsibility, compulsory training is often in her own time, and she gets less pay. Much closer to the traditional image of the harried F1, racing round a hospital at night carry the bleep.
In many ways she does not mind. She is getting bags of hands-on experience and lots of responsibility, and it is only two years. (Plus she does so much overtime that her take home is fine.) Wordloads elsewhere can be a lot lighter and many F1s are not even asked to do nights.
The problem is that if she wanted to get onto training she would have been expected to get home after a 13 hour night shift and get out the books, so she could compete for exams set nationally against both F1/F2s on English contracts and those overseas who have paid for college courses designed to help meet the NHS selection criteria. Alternatively, her original plan was to work flat out for F1/F2 and then take some sort of year long contract (teaching fellow or similar) with time to study. But since Boris' changes opening up the newly qualified doctor job market to worldwide competition, she would have needed to have devoted her limited spare time to making job applications. With no priority for those already in the UK, entry level jobs are attracting up to 2,000 applications from all over the world. If you don't have the experience it is hard to compete with doctors with experience who see NHS salaries, coupled with accelerated family settlement rights, as extremely attractive.
Young doctors are not choosing to go to Australia or New Zealand. They have to go because people like Dr Melissa Ryan have taken the UK training opportunities they need. New Zealand prioritises their own. We need to otherwise it is a huge waste of young futures and taxpayer money. How dare she then use our F1s as justification for people like her, already on training programmes, to be paid more.
What a shocking self-centred approach.