If you set up a pension in your company's name, you can then simply include the payments in your bookkeeping. (Use the 'Other' row at the bottom of the expenses section). This is an allowable business expense so a good way of using surplus profit in a tax efficient way!

Your company will save corporation tax of 20% of each pension contribution. 

We can't advise about specific pension schemes so you need to talk to a financial advisor.