As mentioned, although the A321 is fine capacity wise to replace the B757, there are a number of missions that the Airbus cannot do, which makes it an unattractive replacement. The word from the last webchat was that a decision is being made to replace as many as 10 aircraft whose leases end over the next year or so, which apparently is 6 757s and 4 A320s. Whether they extend their leases or bring in new types or new examples hasn't been announced, but it was suggested that the airline is in talks with both manufacturers angling for the best deal. Presumably, this would affect Thomas Cook in Belgium and Scandinavia, as well as Condor's fleet too.