"Global band the UK hasn't seen since The Beatles"? Behave.
Led Zeppelin, the biggest band of the 70s, multiple diamond selling albums with over 200 million records sold. They also broke The Beatles outdoor attendance record, and broke the Guinness book of Records ticket demand for their one off reunion performance at the 02 in 2009.
Queen, over 300 million records sold, the band with more global songs (4) than any other act (Bohemian Rhapsody, We Will Rock You, We Are the Champions, and Another One Bites the Dust), the first act to play outdoor stadiums in South America, the act who stole the show infront of a global audience (the first concert screened globally) at Live Aid.
The Rolling Stones, seven decades at the top, over 200 million records sold, highest grossing concert tour three times. The only band on the planet that eclipses their status and impact is The Beatles.
Pink Floyd, over 250 million records sold, an album (Dark Side of the Moon) that has spent more weeks on the US album chart than any other (almost 1000 weeks). A reunion (won't happen) would also smash ticket demand records.
I could name at least 20 UK bands who dwarf One Direction in size. And One Direction are not a band, they are a boyband (a vocal group). An act they are to be compared to is the Spice Girls (and with respect to 1D they were not on the scale of the Spice Girls and the girl power phenomenon...only Princess Diana challenged the Spice Girls over who featured on front page newspaper covers).
Yes 1D were a global act, but the UK has had many many global bands (and bands in the truest sense of the word), who were much bigger, than 1D.