I can help but my rate would be 200 CHF an hour given the effort/knowledge required/involved. Interested? 1st meeting/call/email (1 hr effort) free.

Bear in mind there's a lot to consider including but not limited to:

-Currency fluctuations
-entitlement built up in UK/elsewhere
-UK vs. CH systems
-expected "quality of life" level at retirement
-current pension arrangements in CH

Upon determining the facts of your friend I can then provide a referral to a specialist.