In the early 90's when a director/employee I "contracted out" and the sum that built up over about 5 years sits with Standard Life and they tell me it'll likely* pay me about £30 a week at age 65.
However "they" (#) say there will be £144 a week pension at today's rates when I retire at 66 instead of £106 so I suspect my contracted out stuff wont be added to the new pension but will be included in it.

I also "wisely" took out a tiny pension for a few years with "Equitable Life" (Oh they've gone on to life support so that'll be worth about £10 yes (ten) a month!)
I think the best thing I've got and want to hang on to is half a property owned outright with my bro. which pays us low hundreds each per month in rent after expenses and tax.
Oh and Mrs Gold who doesn't get state pension until she's 67 (!) and works for a school will get about £100 a month at today's rates on top of her state pension.
So as is always the case with the Gold clan we earn/get just enough to pay our taxes and too much income to qualify for any benefits!
*I doubt it
# HM Government, so I doubt that too!
Mind you I reckon if my health holds I'll work more and more part time (well, less and less if you catch my drift) to a point where I draw something from my window cleaning as I reckon paying someone to work it and drawing several hundred a month to oversee it is better than getting 20/30k by selling it.