Eddie, it is actually years ago that the announcement was made to increase the women's retirement age to 65. Certainly over 20.
It came as an outcome of a male who took the UK government to the EU court arguing equality should mean he got his pension at 60. He won, but he was a prat to believe it would be affordable, thus the UK government announced the progressive increase in female retirement age to 65, to fix the parity issue.
More recently another change fiddled around with the interim changeover period such that more women had to wait closer to 65 to get the pension.
A shameful episode to remind us all not to rely on any long term government promise, and look after number one.