If true, then how does the buyer arrange for the transfer to be reversed?
BT is generally considered to be the safest method of payment because you can only pay with cleared funds and once transferred it cannot be reversed.
http://www.fasterpayments.org.uk/faqs"Faster Payments are processed in matter of seconds and once your payment is sent, it cannot be stopped or reversed.
For this reason it’s vital that you are certain that you are sending a Faster Payment to the right account. Before you make a payment to someone for the first time, double-check with them that you have the correct account number and sort code.
If you have been advised that the beneficiary’s account details have changed, check directly with them. Unfortunately fraudsters have been known to intercept mail/email and amend the account details.
If you do make a mistake (such as paying the wrong beneficiary, or sending the wrong amount), there is no guarantee that money can be recovered. There are processes in place for your bank or building society to follow to try to get your money back".
http://www.fasterpayments.org.uk/consumers/what-happens-if-i-have-sent-payment-wrong-place"Faster Payments, once sent, cannot be cancelled.
Whilst the vast majority of payments are made without issue, in rare cases problems can arise if the wrong information (e.g. sort code and account number), is entered - resulting in a payment being made to the wrong account.
It’s vital to double check the sort code and account number before sending a payment: payments are processed only using these numbers and getting them wrong is like sending a letter with the wrong address and post code".