Martin, can you prove you have been told by HMRC your activities will be exempt from VAT? If you can then all's well.
If you can't they may return with a bill for the unpaid 20% payable immediately. If this happens and you do not have the funds you will need to call in the administrators.
I have seen so many companies closed this way in the past decades, contract scaffolding always attracts standard rate VAT.
Builders can claim back all VAT paid on zero rated works, scaffolders cannot.
Any of you guys been asked by hmrc about proving why you didn't charge vat. I know of two companies including myself now.
Still ongoing letters going back and forth for me.
Martin
Have you not resolved this issue with HMRC yet Martin?