Mr Björgólfsson, whose wealth has fallen from $3.5bn (£2.3bn) at its peak to $1bn last year according to Forbes, denies any wrongdoing in relation to the crash in the new film, Maybe I Should Have. The documentary has been shown in Icelandic cinemas and was brought to Britain last week by its director, Gunnar Sigurdsson, whose attempt to trace the billions lost in the banks takes him to London, Guernsey, Luxembourg and the British Virgin Islands.