A former colleague of mine transferred his UK "Money Purchase" pot to the Swiss company pension scheme so there is no legal impediment. You may find resistance from the Swiss scheme rules and trustees though.He bought Swiss pension years and did not have a UK tax penalty as the money was transferred to an accredited scheme. He will work to retirement here something you may not do depending on age.
You should get expert advice,try Willian H Mercer in the UK - google it
cheers