DG2023

Hello I am a resident and tax payer working with PAYE in the UK I registered for Self-Assessment and started to fill it for foreign income_ overseas pension . I have 2 questions and need your advice. 1.Is there any exemption for the state pension from Turkey on DTA 2.On tax return, for individuals Are there allowable expenses that I can claim for foreign income like flight tickets, rent, etc. I am working with PAYE and not a trader/business owner or running a company. Best Regards