Brentford will register Reguilon to be able to feature in the Premier League and will hope to have that done in time to ensure he's available for selection against Nottingham Forest on January 20. He will likely have to return to the sidelines after that, however, with the Bees taking on Spurs, the Spaniard's parent club, on January 31, with a clause likely to be added to stop him featuring in that game.