Another 25 goals next season and I'm sure he'll be pulling on the royal blue shirt the season after.
On special dispensation maybe, or with EU citizenship. He would be playing in PL this season if regulations weren't a problem.
I very much doubt Brexit will have any significant impact on future transfers anyway. It'll be a little harder, but it's doubtful it will hold any major implications to transfers.
People often tend to say this won't effect that, but invariably if the rules change, it will. At the moment any European citizen can come and play in UK,. We have some strong controls on African, Asian and South American players. This is often negated by moving a player via a European country with a more relaxed policy, or at least a more favourable policy towards the players nationality. But it still takes at least 3 years to become an EU citizen.
We could well end up with a deal that keeps freedom of movement with EU, a deal that has free movement of labour, or something else. But some of the key areas of Brexit in terms of immigration, would directly effect football.