Zayn Malik and Louis Tomlinson were spotted back on UK shores on Tuesday (3 March), but appeared to arrive separately from their remaining bandmates, Harry Styles, Liam Payne and Niall Horan.
Louis was dressed in a bright red jumper and black jogging bottoms, while Zayn sported a brown leather jacket and black jeans.
The boys looked fresh-faced and in good spirits after touching down at Heathrow Airport, despite coming off a long-haul flight.
One Direction now have a few days of rest before they head to Singapore to continue their 'On The Road Again Tour'.
Zayn, who is engaged to Little Mix singer Perrie Edwards, is set to delve into a little solo work of his own, after it was confirmed he will feature on Naughty Boy's second studio album.
The pair have been in the studio over several months, and producer Naughty Boy confirmed their collaboration to The Sun.
"It's a good time for Zayn to showcase what he can really do," he said. "I don't think that is being fully exploited with the band because there are five people and it needs to be balanced out."
However, fans shouldn't worry that 1D will disband anytime soon, with Naughty Boy confirming Simon Cowell is "very happy with the song and supports the whole thing".
Naughty Boy added: "They [1D] are all experimenting and dabbling but I think the band will be together for the next 20 years."
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Watch One Direction's video for 'Night Changes' below: