Hi,
If you supply services under the general rule to overseas companies then these would be classed as outside the scope of VAT. However, the supply would still be reflected on your UK VAT return as a net supply in box 6.
You can see guidance below, specifically section 3.7
How to fill in each box on your return
If you sell goods within other countries and these goods are not in the UK at any time then these are outside the scope of VAT and would not appear on the UK VAT return.
Thank you.