I know, but I really went over with a comb on the HRMC website, asked them, asked all around and everyone agreed. These transactions are 'zero rated' -- therefore, you need to pay 1[34].5% VAT back... Stupid, but the rule is clear.
Incredibly bizarre that as a small company, you try to 'export' and thus bring cash back into the economy, and are in fact actively prevented from doing so when on that scheme.