Hello and welcome to the site. Thank you for your question.
As far UK taxation is concerned, as UK resident your worldwide income is chargeable to UK taxation.
Your Swedish government pension is unrelated to your UK state pension and it will not be deducted from your UK pension. So, there is no reason why you should not get both pensions.
Your total income in a tax year would be (566+545)x12=£13,332
Based on personal allowance for 2015-16 of £10,600, your taxable income wouldl be (13,332-10,600)=£2,732 and the tax on it at 20% would be £546.40.
You will be able to claim foreign tax credit relief against foreign tax suffered on swedish Government pension by completing supplementary pages SA106-Foreign on your tax return.
I hope this is helpful and answers your question.
If you have any other questions, please ask me before you rate my service – I’ll be happy to respond.