Two things to note, the SFB flight to Man that got rerouted to Paris was a sensible decision, if the a/c had landed in Man it would not be able to leave.
Remember the a/c in question is not operated by XL UK but for XL UK by XL France, so it flew back to it's base.
Now l am only guessing that the reason XL France & XL Germany were brought last night was because they were operating in or close to profit.
Remember XL UK was loosing money at an alarming rate and made a loss of over 20 million last year before fuel prices went through the roof.
PS. What has happened to the server clock at pprune, this post showed 06-45 this morning when l posted.