The new lineup of reactivated British extreme metal legends CARCASS just completed a three-night residency at the Underworld in London, dubbed "Undertaking The Underworld". Fan-filmed video footage of last night's concert can be seen below. Joining guitarist Bill Steer and bassist/vocalist Jeff Walker at the gigs were new drummer Dan Wilding (ABORTED, TRIGGER THE BLOODSHED) and guitarist Ben Ash (PIG IRON, DESOLATION, LIQUEFIED SKELETON).CARCASS recently recruited Andy Sneap (MEGADETH, ACCEPT, EXODUS, ARCH ENEMY) to mix their comeback album, "Surgical Steel", after the CD's producer, Colin Richardson (FEAR FACTORY, MACHINE HEAD, NAPALM DEATH, SLIPKNOT, BULLET FOR MY VALENTINE), quit the project two weeks into the mixing process. During this past Monday's night's concert, Walker claimed that Richardson walked away from the mix in order to work on the new TRIVIUM album. CARCASS' first studio LP in 17 years, "Surgical Steel" is currently being mixed by Andy Sneap (MEGADETH, EXODUS, TESTAMENT, KILLSWITCH ENGAGE) for a late 2013 release via an as-yet-undetermined record label. The band's first studio outing since 1996's "Swansong" will feature guest vocals from original sticksman Ken Owen. In a brand new interview with Chile's Radio Futuro, Walker stated about the new CARCASS CD: "We think we've made a good album, so it's gonna be very interesting when people get to hear the record. We can't wait to see what people think." He continued: "It sounds like CARCASS. Even the drumming sounds like CARCASS. Everything about it… I think it's gonna shock people, how good it is. I think it's got all the elements that people like, yet it still sounds fresh. So that's all I can say, really, 'cause we don't really sound like any other band, and the fact that after 17 years, we wrote music and it still sounds like CARCASS, I think it's good." Regarding how the material for the new CARCASS album came together, the band's guitarist, Bill Steer, told U.K.'s Terrorizer magazine: "I found myself playing riffs that sounded like CARCASS. This was after the band had finished the whole reunion cycle of shows and festivals. So, officially, I would have been playing with other bands and stuff, but for some reason whenever I picked up a guitar at home I was coming up with riffs that sounded like CARCASS. I got on the phone to Jeff and said, 'We could have a crack at writing a couple of tunes and seeing if they're strong enough and take it from there.' We also agreed if it didn't sound like carcass or have that kind of vibe to it, we would just drop it. So that was the thing, we got together and started working on some stuff and just immediately got the excitement back very quickly." Added Bill: "It definitely sounds like CARCASS. I think we just generally by accident captured the flavor of past music that we have done and you can't help but push it forward. We have really been creative and when you are looking at things like guitar harmonies, it's way more adventurous on this record. It's not just parallel harmony like we did in the past, things branch off in different directions. "A lot of what is happening now is based on rhythms rather than actual riffs. We were discussing this a lot during record sessions about how the riff is almost dying or dead already. People spend a lot of time chugging on the bottom string [but] that's a rhythm, it's not a riff. We can't write a song, never mind an album, without it being chock-full of riffs." Stated Jeff Walker: "I'd like to feel like we are giving CARCASS fans what they want again. I'm a realist and I think Bill has realized and Dan know what people like about CARCASS. We're definitely delivering." Guitarist Michael Amott and drummer Daniel Erlandsson, who have been touring with CARCASS since the band's reunion was announced in 2007, are no longer involved with the group due to scheduling conflicts with their main band, ARCH ENEMY.