Castle Rock, known until 2007 as Tynemill[1] is a British pub chain based in Nottingham and the East Midlands.
It was founded in 1977 by former Campaign for Real Ale (CAMRA) chairman Chris Holmes.
[3] They operate several pubs or cafe bar establishments which all have a policy of selling cask beers from regional and local microbreweries.
They also own and operate the Castle Rock Brewery, a microbrewery located in Nottingham.
The old Tynemill brand name for the pubs has now been replaced by Castle Rock.