I get a UK pension. I am now a US citizen. Can I deduct the contributions I paid into this pension from this income and can I deduct the contributions my employer paid

I was born in the UK and have been permanently resident in the US and a US citizen for 20+ years. I now get a UK pension for the years I worked in the UK as a UK citizen before coming to the US. My questions are, for taxable income purposes,  (a) can I deduct the contributions I paid into my UK pension from the taxable income of this pension  and (b) can I also deduct the contributions my employer paid into my UK pension fund from the taxable income of this pension  .  Both the above contributions were made while I was in the UK (and a UK citizen).