Yes, domestic, to EDF.
Well according to that link to that thread, no VAT should have been added as EDF will be registered for VAT. But even so, a link to post by a CAG member is hardly an authority, especially when it says the opposite to what the HCEOA link says
It seems to me that VAT can only be added to fees that have been paid by the creditor, ie to instruct the HCEO and the costs of issuing any writs. No VAT can be added to court fees such as transferring to the High Court, that's certain. So for example, it may cost £100 to instruct the HCEO and £66 to transfer to the High Court (I think that's the cost). VAT can be added to the £100 (£20) as this is a service addressed to the claimant, so £120 including VAT, plus the £66, a total of £186 paid upfront by the claimant (the person owed the money).
If the claimant is VAT registered, he can reclaim the £20 VAT from HMRC and the debtor pays the remaining £166. However, if the claimant is not VAT registered, he can recover the full £186 from the debtor.
Enforcement fees play no part in this. they are a separate charge that is not a service addressed to either the claimant nor the debtor. It is a statutory charge that covers all actions of a particular enforcement stage.