Having spent the past three months jetting around Europe and eastern Asia, Biffy Clyro have announced two arena dates on home ground.

Supported by Brand New, the boisterous trio will perform at Glasgow's SSE Hydro and the Aberdeen Exhibition and Conference Centre on November 29 and 30 later this year.

It's been a remarkably busy summer for the Scottish group, following an appearance at Radio 1's Big Weekend with the release of their seventh studio album Ellipsis, an explosive work that obliterated any preconceived notions of 'good old Biffy Clyro'.

Amid the relentless touring, they did manage to crowbar in a rare fortnight off, meaning they're "recharged and ready to go" for their Scottish dates.

"We can't wait," says bassist James Johnston. "These are the people that have supported us from the start and there's no place like home.

"It's nice to feel like we're coming back to a celebration, and to play Glasgow and Aberdeen is amazing.

"We've got a bit of time to have a few tricks up our sleeves - our shows are always full of energy, passion and excitement, and we love to have the fans sing along."

When pressed for further details on said surprises, James laughed saying "they're right, tight up the top of our sleeves," - but this will be the first time many Scottish fans have seen new material performed live.

Ellipsis, the latest release after a 20-year musical marriage, is more experimental in the band's efforts to "break new ground".

Lyrically biographical, it documents a difficult period for all three members. The aftermath of the 2013 release Opposites saw front man Simon Neil struggle with depression, exacerbated by a number of personal bereavements.

Neil previously told NME: "It felt like when things couldn't get any worse, they just kept getting worse."

While confronting Neil's personal demons, Ellipsis also chronicles the journey back from the brink, the rebirth of the band signalled by the fetal artwork on the cover.

"We were worried it [cover] would come across jokey or throwaway," admits James. "But it turned out even better than we imagined."

Writing the album itself was a struggle, the group in 'self-imposed exile' in a farmhouse in Ayrshire, battering out material in an attempt to capture something fresh - efforts that evidently paid off in formidable sales.

James added: "You never know it's finished until very end. It was only when we were sent a little demo of the track Rearrange we felt we were breaking new ground.

"I think everyone has ups and downs while struggling through life. We've had some amazing experiences, but sometimes that effort takes its toll.

"It's a reminder you've got to take breaks - get off the ship and get onto dry land and reminder that no one is above that. It gives a lot of ammunition for Simon to write about.

"We put a lot of pressure on ourselves to release good material, release records we believe in and play what we can still play in 20 years time.

"We never feel need to get a certain number, but when you get to number one it kind of does f*cking matter, and it's a huge honour."

Saturday sees one of Biffy Clyro's biggest shows to date, performing for a 35,000-strong crowd at Glasgow's Summer Sessions - what may have seemed like a pipe dream to three scruffy teenagers from Kilmarnock.

But a smiling James admits fame and record sales will always come second.

He said: "We always like new challenges. I don't really know what's next - we'll keep going same direction, keep pushing ourselves.

"The most important thing is to keep being happy. That's one of great pleasures of being in Biffy Clyro - what makes me really proud is that we love it so much. We laugh, we still love each other's company and we love it as much as we do when we were 15.

"If we can keep doing that I'll be happy."

Tickets for Biffy Clyro's tour dates in Glasgow and Aberdeen go on sale on September 2 from www.gigsinscotland.com or by calling 08444 999 990.