1. What can I use to pay the suppliers (from Alibaba or another Asian company)? I know that they usually make transactions in USD, so I can’t use my sterling business account, without paying huge exchange rates.
You use your TW (or WF) account for paying your suppliers in USD.
2. Is it OK for an accountant and from legal point of view to use a bank account in pounds for the Amazon transactions, but another account in USD for suppliers?