Ultimately, this thread is a good reminder why we're posters on a forum and the people employed by the club to oversee transfer activity are in their jobs.
The downside is that this is little more than a loan. If he has a good season we could find ourselves having to hand back our player, admittedly for a big profit but less than the market value. It's an excellent deal for Chelsea but it's not brilliant for Southampton. Ultimately, they've chosen...