This is the QM docking at King George V dry dock in Southampton which unfortunately, along with many more in the UK, is not there any more. I worked for the company that leased the dock from ABP and in more recent years we dry docked the QE II and a number of the P&O Cruise liners (amongst others) before it was closed in 2005.
If you google King George V Dry Dock (images) there are some great photos of the dock and the vessels.