Hello and welcome to the site. Thank you for your question.
Tax calculations - tax year 2013/14
Total income is (20,853+34,250) = 55,103
Personal allowance = 9,440
Taxable income (55,103-9,440) = 45,663
Income taxed at basic rate (32,010x20%) = 6,402
Income taxed at higher rate (13,563x40%) = 5,461
Total income tax due = £11,863
The tax office would have applied tax code 944L against your pension income. This means that full personal allowance is allocated against the pension.
It is likely salary from employment would then be taxable at OT or D0 rate.
More information on what tax codes mean can be found here
I hope this is helpful and answers your question.
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