I'm not too sure Lynda, but I'd have thought if you pay through bank
transfer your bank has proof of your payment, so you might be covered that way but maybe not get your money back straight away. When you look at this part of their website, its like they quite a substantial company
http://travelfx.co.uk/aboutus.phpWhat the difference is between paying with a debit card and doing a bank transfer I'm not too sure.
Its like every online payment, but its a chance I'm willing to take in view of the fact they despatch same day if paid before noon, or next day if you pay after noon, so its a tight window for a company to go bust...but still not impossible.