Aveline the training issue has been in the making over a number of years but the first thing that IMO is medical graduates should be guaranteed an F1/F2 job and there should be some weight given to where graduates actually want to live and ATM there isn't.
Specialist training posts should be allocated first to UK trained doctors but this would require a legal change in our employment law, I believe.
Increasing the number of training places is not easy to do without increasing the number of consultants and ATM many specialisms are short of consultants, half of NHS organisations have at least 10% of their consultancy posts unfilled! You can't train doctors unless you have the people with the skills to train them, that's why losing doctors part way through their specialist training is so damaging to the NHS.
Regardless of those who believe Doctors, especially consultants, are well paid, compared to many with similar levels of expertise and training and who are in short supply, they are most definitely not! However, because they can only work for the NHS if they want to be trained, they can't market their skills like lawyers, IT specialists, recruitment people etc which holds their bargaining power down unless of course they go abroad where pay and conditions are much better. fwiw my daughter has friends in these occupations and despite having had far less training, having smaller uni debts they are all paid significantly more than she is at the same age! Fortunately for the NHS she wanted to be a doctor and I think she'll stay in the UK.
Over 4k left in 2024 to work abroad and we need to encourage doctors to continue working, over the past few years there's been a year on year 10% increase in the numbers taking early retirement and this is a serious loss of skills both in terms of patient care but also in training. Retention has to be an important factor is increasing training places