That would definitely solve the problem. They would have had to ferry a B757 to SNN. They would then have to use the B757 that's about to arrive in DUB for something else. It looks like they're using it to fly people from DUB to SNN. What happens after that? Unless they're just going to ferry it from DUB to SNN. The more I think about it, the departure time from SNN must be wrong.

I went onto dublinairport.com; it's showing CO126 as arriving late at 1719. I took at look at shannonairport.com; it shows CO126 leaving at 1830. It looks like they are using the same equipment and that co.com may not have current information.

The web is just great. Hmmm, let's see, what would Dublin Airport name its website? LOL, and there it is!