This time last year £16m was still our record transfer fee, I'll be amazed if Wenger is paying that for a backup RB
So would I to be honest.
According to SSN he's had a medical and the fee is £16mil - whether there's an initial lower fee with add ons, who knows?
But holy **** that's a lot of money for a 19 year old that's only played 25 games in total for Southampton. I would imagine a lot of those would have been cup games etc too.

