Ha, kind of funny, although I think it might be set up.  We all know that Nick Grimshaw and Harry are BFFs (or maybe more), so it's not surprising they called him.  Here's the background.  Nick is on the radio (like us) and  on his show on BBC 1, he plays a game called Call or Delete. Basically famous people scroll through their phonebook and then prank call a person OR delete their number. Matt Healy from the band The 1975 was on the show and called Harry, basically asking for $5000 and to put him in touch with Niall. 

 My favorite part is when he says, "I can try The Wanted if you have their number."  LOL