Oberon class submarine at Pounds Scrapyard, Portsmouth, UK. It could be either HMS Otus or HMS Opportune shown in the photo here:
...but HMS Otus is now a museum ship at Sassnitz, Germany, so this one might be HMS Opportune (or then again it might be some other boat of the same class, at least HMS Otter is known to have been sold to Pounds).
Categories: Info Requested
, Sea - Military - Submarines