Here is a good link in English, see the PDF overview doc. in the top right hand corner. See section on 1st pillar.
http://www.bsv.admin.ch/themen/ueber...x.html?lang=en
I believe current retirement age for women is 64, although there is some talk of raising it for men and women I think.
You should also see if a bilateral old age pension agreement exists between Swiss and UK; or rather the Swiss/EU agreements I believe. There is one for my country of origin, and thus there are advantages in terms of qualifying years, payouts, etc.