The 'Pompeii' hitmaker has been working with the two stars - and a host of new artists - on new material, including tracks for the 'Someone You Loved' singer's highly anticipated second album.
He told the Daily Star newspaper's Wired column: "I did a bunch of writing with Yungblud recently, we met for the first time at the Olympics and got on really well. I've also done stuff for a bunch of new artists which was fun."
The writing with Lewis - which Dan has opened up about before - has been the highlight, and he loves getting to "hang out" with his pal.
He added: "I spent a few days doing some writing with Lewis. I know that he's taking his time and wants to get it right.
"It was lovely to see him and he's as f****** hilarious as ever - never turn down the chance to hang out with Lewis."
Bastille - who worked with Riz Ahmed on spoken word track 'Promises', which features on their recent chart topping album 'Give Me The Future' - have made more of an effort to collaborate with other artists and give themselves other experiences and influences.
Dan said: "It was all about letting more people into our world. So I've met a lot of artists as a songwriter, which I really love because it's such a different hat to wear.
"It's so nice to go in a room with some interesting people, chat for a while and leave at the end of the day and that's it."
Meanwhile, Dan previously revealed he had been writing a track with Rihanna in mind, but he doesn't think the 'Diamond' star will end up using it.
He said: "I imagine with that project, they heard and work on so much music and will just know when it's right.
"There was a minute last year where I thought I'd done it. But I don't think it's happened."
On the same day that Glastonbury welcomed back Margate's adopted sons, The Libertines, Margate itself put on it's very own Leisure Festival as it...
Sheffield's very own all girl group Pretty Fierce are still on a high after the recent release of their debut single - 'Ready For Me'.
Three nights before the end of his current tour Will Varley returned to his home town of Deal to delight a sold out crowd in The Astor Theatre.
With only a few days to go before Portsmouth based songstress and producer WYSE releases her new single, 'Belladonna', we caught up with her to find...
Colorado raised, Glasgow educated and Manchester based Bay Bryan is nothing if not a multi-talented, multi-faceted artist performing as both...
Former Marigolds band member Keelan Cunningham has rediscovered his love of music with his new solo project Keelan X.
Wiltshire singer-songwriter Luke De Sciscio, formally known as Folk Boy, is set to release is latest album - 'The Banquet' via AntiFragile Music on...
Electronic music pioneer and producer Annie Elise says that the release of her first EP - 'Breathe In, Breathe Out' feels "both vulnerable and...