@Starface @Mia85
Just popping on to say I read your replies with interest - I've been decorating my home office for the last few days so have had plenty of time for thinking!
Your thoughts are very interesting, and certainly some of them I hadn't thought of - like the timeline idea, and also using the personal pension money to pay off the mortgage over a few years.
To answer a few of your questions:
Yes I've built up full state pension entitlement
Yes USS is a DB scheme (my estimated pension at 66 is approx £8.4k subject to me continuing to pay in of course, with a £25k lump sum)
Yes the mortgage interest is outweighed by investment returns but as you say, small beans compared to mental freedom!
Yes if I can (and if indeed there is a payment) I would prefer to hang on for a redundancy payment
No I can't take a sabbatical (not worked there long enough)
I haven't seen an IFA yet but I have an advisor that manages my personal pension so I will run my idea past him and see what he comes up with
I believe I can withdraw 25% of my pension(s) as a lump sum with no tax implications? Will check this
Interesting point @Mia85 about advice, and pension companies unwilling to accept a transfer in without a positive recommendation. I'll ask my FA about that too.
The biggest 'problem' (not a problem at all, I know I am very very privileged) is that leaving those pensions where they are, assumes that I will make it to pension age, and be healthy enough to enjoy them. Whereas if I transfer them now, I face the 'cons' you've outlined (paying for the advice, taking the risk myself of investment rather than via a DB scheme) but I also have that time freedom to enjoy my life while I am still young, and healthy enough to do so. I have a health condition (diagnosed over 30 years ago), controlled by medication but nonetheless which puts me at higher risk of certain cancers, or even my condition deteriorating and affecting quality of life, at some future point.
Can't help but think that my relative with terminal cancer is only 6 years older than me, and will not get to benefit from their pensions, and still had so many plans for life that will now be unfulfilled. This is uppermost in my mind at the moment as I think all of this through, but I also realise I need to be rational, and not impulsive.
I think my next step is to contact my advisor to run it past them.
Incidentally, I can request a CETV from USS free once every 12 months. I don't want to 'waste' it by requesting it now, and then having to pay, should I decide to go ahead with my plans. I tried to look up how to calculate a CETV but it said something about calculating your future pension at approx x20, which is ludicrous as it gives me something like £170k. I expect I need to calculate it on what my current estimated pension is x 20, and not what my future pension would be, if I keep paying in - anyone got a way I can work that out?! I'm due to get a statement from USS hopefully in the next month, as my last one was after I'd only been in the scheme 6 months, March 2020 (which feels like a LIFETIME ago!)