Available online at
http://www.bbc.co.uk/programmes/b06bcst6.
Starts at 8m50s with discussion of Ryanair's reluctance to pay up.
Followed by a more general segment at 12m45s on CAA ruling that (AIUI) failure of a part before its scheduled end-of-life / service date is not 'exceptional' and therefore not a get out from payment for the carrier, although an unexpected maintenance / airworthiness directive could be.