Flat rate VAT and EU supply of services

I am registered for Flat Rate VAT, and have supplied services to another EU country. As this is a supply of services with a place of supply outside the UK, my read of the HMRC Flat Rate guidance is that this turnover can be excluded from the Flat Rate turnover for the VAT return.

However, although the invoice shows a VAT reversal, the total turnover still includes the invoice value. Any idea how I can avoid this? The way Quickfile does it would be correct for supply of goods, I think.

Thanks for any advice.