Ryanair, Europe’s leading low fares airline, today (12th September 2008), in response to their request, offered the CAA the use of one of its aircraft for the next two weeks in order to secure the return of stranded holidaymakers abandoned by the closure of bankrupt airline XL Airways. Ryanair is using one of its spare 737-800 aircraft to help the authorities in the UK and Ireland provide services for outgoing and returning passengers who have booked with the now defunct airline.
Above from Ryanair website