If you have non GBP expenses that need to be claimed on your HMRC VAT return. You should convert the fee using an inter-currency journal transfer. But it has to be submitted at the HMRC monthly exchange rate so you get loss or gain: https://www.gov.uk/government/publications/hmrc-exchange-rates-for-2021-monthly
Here are the full instructions for completing a currency transfer journal in Eclipse: https://tphsupport.freshdesk.com/a/solutions/articles/2100034273