Throw money at it. They can afford it, they found billions in contracts for their mates during covid, they can afford to fund the NHS.
Streamline visas and immigration approval so we can fill staffing gaps from abroad. This will ease staffing pressures and working conditions for existing staff.
Reorganise management, especially on the non-clinical side. When I worked in the NHS (non-clinical) I had a shift manager who I reported to, I also had a team manager who I also reported to, I also had a department manager who I also reported to. Questions about the job at hand - shift manager. Leave requests, task assignments/duties, rota - team manager. Performance reviews, HR issues, etc - department manager. A role divided amongst three people that could have been done by one. This needs to change.
Run a huge educational ad campaign to show people which services they need to access and when. As part of this campaign, educate people on how to self-care for minor ailments and when to seek medical advice. Invest in out of hours GP services so patients don't resort to A&E as their only option. My area uses out of hours hubs where local practices group together and take it in turns to provide out of hours appointments to patients from all of the surgeries in the group. Put an out of hours GP service in every A&E, when patients are triaged and its not an A&E issue they get bumped to A&E.
Make mental health services fit for purpose and easily accessible, help people before they reach crisis point.
Train more pharmacists in additional services such as prescribing antibiotics where needed, renewing straightforward repeat prescriptions without the need for a GP, diagnosing and treating UTIs, etc.