I know it's a bit late in the day, but I'll stick my oar in here.
I've got 37 years
NHS service and can see the glimmer of retirement on the near horizon.
My son has worked for the newly privatised railway industry for the last 5 or so years.
Both have relevance to this discussion!
Helen is right the NHS scheme has an excellent reputation, and even the new-this-year-let's-screw- them-a -bit-more scheme is very generous, not as good as the old-lets-screw-the-taxpayer scheme that I'm in,but still good.
The old scheme is a traditoinal final salary scheme, the new one is a 'working life average earnings' scheme. The relative in question will need to take advice as to whether to stay with the old scheme or jump in to the new. (As a rough guide, the younger you are, the more attractive the new scheme is - this advice is worth what you just paid for it - as is everything that follows).
The NHS also has arragements for AVCs, with - I think - Clerical Medical or some such, it used to be with Equitable Life - guess where mine is! (clue - it's going down the sluice). In the long term the AVC might be a good bet (ie - it really is a gamble) if you can keep up the payments and aren't freaked out by the statements in the early years!
As an NHS employee I would think you would be barmy to leave the scheme.
I would consider a long-term cash savings plan (your choice) as an alternative to the AVC
Now - my son - he had a choice of joining a 'hybrid' pension scheme, very similar to the old British Rail final salary scheme, or joining his company's money purchase scheme. If - and it's a huge if - the NHS pension were to change dramatically again in the coming years - this is likely to be the sort of choice that NHS worker might get.
This of course, assumes that we will have a recognisable NHS at all in a few years.....