Non-Resident director of LTD: how to claim travel expenses leaving from abroad

Hello, I am a non-resident LTD director, and my permanent workplace is my home (abroad). I occasionally travel for work to visit clients in the UK and other countries, how do I calculate the mileage allowance? the traveled distance from my home (abroad) and the visited client? And for the rest of the expenses I can store them electronically them and aggregate them as financial adjustment for bookkeeping? Thanks in advance

Hi,
Thank you for your query, unfortunately we are unable to advise on this.
You will need to acquire the services of a Tax professional to provide you with Tax Advice
Thank you.