Hi,
The guidance states that if you make wholesale supplies then you have a choice between treating then within the TOMS scheme or outide the TOMS scheme.
If you treat them outide the TOMS scheme then this does not necessarily meam that you have to charge 20% on all supplies as it depends on the type of service supplied and hence the place of supply of that service. You can see the guidance here:
Place of supply of services (VAT Notice 741A)
If a service you provide comes under the general rule then the supply will be outside the scope of UK VAT if the business is overseas.
Thank you.