The 10th anniversary of the Bloodstock Open Air will take place at Catton Hall in Derbyshire, UK from August 13th – 15th.

Organizers have issued the following update:

Bloodstock Open Air has announced a further two additions to it’s 2010 line up.

German metallers POWERWOLF will headline the SOPHIE LANCASTER stage on Friday 13th August. The Teutonic terrors look forward to their debut UK appearance at Bloodstock Open Air’s 10th anniversary event.

"It's a big honour for us to celebrate the metal mass at this legendary festival" comments guitarist Matthew Greywolf. "This will be our first time in the UK, and getting the chance to perform at the country's biggest metal festival is incredible. We can't wait to unleash mayhem there!"

Since 2003, the Metal Blade signed five piece have amassed a large and loyal fanbase with their highly entertaining live show, led by Attila Dorn, half frontman, half evil minister. With a reputation across Europe as one of the most exciting bands out there, and Bloodstock's reputation for bringing the hottest new bands in metal to the UK for the first time, their addition to this year’s line up with this exclusive appearance is a no brainer, and we look forward to their Satanic Sermon on Friday, August 13th, 2010.

Joining them will be British thrash maniacs HOSPITAL OF DEATH. Originally formed in 1994 to play a one-off show, the band rediscovered their love of old school thrash at a 2006 reunion, and have kept thrashing ever since, with fun-filled songs such as 'Transformers', 'Let’s Go Apeshit' and 'Stairway To Hell'.

Look out for the final Bloodstock Open Air 2010 headliner announcement on Tuesday, June 15th.

Band lineup so far: MESHUGGAH, CHILDREN OF BODOM, FEAR FACTORY, TWISTED SISTER, OBITUARY, ROSS THE BOSS (with Scott Columbus), RAGE, ANDROMEDA, BEHEMOTH, DEVIN TOWNSEND, DORO, LEAVES EYES, SUFFOCATION, CANNIBAL CORPSE, KORPIKLAANI, GWAR, AMORPHIS, GOJIRA, SONATA ARCTICA, GORGOROTH, BLOODBATH, BLACK SPIDERS, EDGUY, ENSIFERUM, ONSLAUGHT, SNAKEBITE, HOLY MOSES, BENEDICTION, ENFORCER, KILLING MACHINE, MITHRAS, THE PROPHECY, STEELWING, REGARDLESS OF ME, WITCHSORROW, EVILE, BONDED BY BLOOD, MORDECAI, PURIFIED IN BLOOD, DESECRATION, POWERWOLF, HOSPITAL OF DEATH.

Further details here.