Public sector pensions (Teachers, Police, Civil service, NHS etc) are all broadly similar. The 'gold-plated' line related to the final salary aspects and that they were index linked. (Went up with the retail price index)
In 2015 The government told all public sector pension members that the way their pensions accrued and would be paid was being changed.
In my case (and broadly in the other public bodies) this meant that anyone who was within ten years of their retirement date (so for me this was 60) .. would stay as things were and be able to continue accruing pension , ( retiring on a final salary 1/80 scheme.) So someone aged 55 in 2015 would work another five years and reap the benefits.
As an example (final salary)
Years worked : 30 x salary : 45000 (at retirement) / 0.08 = pension of £16875 pa.
Everyone who was below the 'cut off' age (under 50) was pushed into the new scheme. Which is a career average. They would have their final salary pension 'frozen' which could be taken at 60 but from 2015 could not add to it, could not increase it or pay into it anymore.
As is pretty obvious to anyone with even basic legal knowledge will know, this decision was hugely discriminatory. And was found to be so by the high court, (the mcloud judgement) . First of all on age grounds (50-60 year old gain whilst those under 50 lose out) .. and again on sex discrimination grounds as a 'career average pension' affects women who take maternity leave, part time for child care reasons etc). The government was forced to reverse the decision and put everyone back in the final salary scheme if they chose to do so. Until APRIL 2022 When it closed to everyone.
Annoyingly, this still hasn't been completed and anyone like me who plans to retire this year can't actually find out what there pension will be. We have to claim it 'as is' (which for me is 4 years missing final salary and my salary has increased by 15k in that time due to promotion) .. and then get it adjusted in October 2023 when the 'remedy' will be applied.
It's a complete fucking shambles. The court case was won in 2018 and it's taken FIVE YEARS to go through 'consultations' just to check that people would REALLY prefer to have the old better pension than the much worse new one !!
So no OP. There is no longer a final salary pension in the NHS or Civil Service. And the new one is definitely not gold-plated. Another reason people are leaving NHS in droves . Shit salary was bad enough.. but at least the pension was half decent. Now there isn't even that. Not surprised they counselled against your nephew becoming a doctor.