The buyer can pay in different currencies according to the country he is shopping from.
To change the currency, the buyer has to click on the flag icon in the top right corner of the page and select the currency of the country in the “currency” section. When the buyer will pay his order, he will be charged in the currency he has selected and if his payment card is registered with a different currency, the bank will automatically convert the price using their exchange rate.
It is also possible to purchase ASOS gift vouchers with different currencies and if the buyer wants to pay for an article on ASOS with a gift voucher, he just has to make sure to select the same browse country flag and the same currency to spend it.