Stanley Fink is very angry with Miliband using him as a tax dodging tool to try beat up the PM earlier. He has a pretty good explanation for his Swiss bank account too:

“I challenge you to repeat your allegation outside of the House of Commons – or to withdraw it publically [sic].” 

UPDATE:

Labour; will be no backing down on Lord Fink, Ed will make allegations again outside Parliament #HSBC

— Andy Bell (@andybell5news) February 11, 2015