My understanding is that for most people, they form their political opinions quite young (in your 20s) and then those opinions don't change throughout their life. You do tend to see people become slightly more Conservative over time regardless, but that's not them shifting, that's because the parties shift - if you were very liberal in 1950 but continued to hold the same positions until 2020, you would not be especially liberal because of how society has shifted on those issues (e.g., you were pretty damn liberal for supporting the decriminalisation of homosexuality at one point, now supporting gay marriage is blasé).
The current older generation genuinely is just especially Conservative - their cohort has always been very Conservative, because if you are 65 now, and you formed your political consciousness when you were 25, that was in 1977 - that is, you were part of the Thatcherite generation. Even thirty years ago, the older generation was less Conservatively titled because the pre-Baby Boomers tended to be inclined towards Labour.
This probably is reflective of class differences and the changing nature of the economy over that period. Age obviously does impact your class - a pensioner who was a factory worker in 1980 and is retired now has different class characteristics to someone who is a factory worker now and can expect to be a pensioner in 2040, because how factory workers are treated is different, the strength of the unions is different, the nature of competition from globalisation is different, what we can expect from the pension system is different.
I don't know how much that answers your question. It's genuinely a topic that fascinates me (class construction over time) and I think something critically understudied.
