Manchester United have completed the signing of Aaron Wan-Bissaka from Crystal Palace in a deal that could potentially be worth £50m. The England Under-21 international, who made his first-team debut for Palace less than 18 months ago, has signed a five-year contract with United worth £80,000 a week. United have agreed to pay £45m for Wan-Bissaka and another £5m in add-ons, making him the club’s fifth-biggest signing. There is also an option to extend his contract by a further year. “It’s an unbelievable feeling and an honour to call myself a Manchester United player and something I know that only a small number of players have the privilege to say,” Wan-Bissaka said. “As a kid, every kid wants to play for a team like this. I’m grateful and it’s an honour to represent this club. I think I will improve every step and learn different things around new teammates. I think Manchester United is a big club, big family, big fanbase and they all stick together. I can see that I have made [my family] proud with this decision and where I’ve come from. I personally think they know what’s right for me.” Wan-Bissaka is United’s second signing of the…