I am thinking of localising from an expat contract and I can see very good opportunities of switching part of my UK company pension into the same company's Swiss pension, which I have been told I can do.

That bit is OK what I do not know is can this transfer be set against income tax ? Simplistically I am thinking if it can effectively it can mean use this lump sum be set against my first year's earnings for tax purposes,

The reason I ask is that I have been I can buy past years from my current salary and set against tax : hence I turned my mind to the question I set above.

Thanks for any knowledgeable response

Have a problem understanding your question. ?set against tax? Are you wondering what you can deduce from tax?