Jude Bellingham will officially wear one of the iconic jersey numbers at Real Madrid and the jersey number 5 was once worn by one of Real Madrid's legendary players, Zinedine Zidane. It seems that Bellingham really wants this jersey number and he has also thanked Jesus Vallejo for agreeing to give him the jersey number 5. Bellingham doesn't want the number 22 shirt currently worn by Rudiger because he really wants to wear a new number from now on and it goes to number 5 at Real Madrid.
On the other hand, the reason for choosing number 5 is because Bellingham was very inspired by Zidane and it's only natural that if we pay close attention to Bellingham's style of play it is very similar to Zidane's. It looks like this will be a good start for Bellingham with Real Madrid and he can't wait to play alongside Modric and also Kroos in midfield.
A good choice, especially since no one will claim this number even if Real Madrid signs both Mbappe and Haaland
By the way, yesterday I read an interesting thought somewhere - if Real Madrid signs Mbappe, then Zidane would be the best coach to put Mbappe's brains in his place. He is one of the greatest footballers in the history of France and for Mbappe he would be an unquestioned authority. I am completely satisfied with the way Ancelotti works, but there is something rational in this reasoning.