[londongardener]

According to
http://www.instructables.com/id/SCE2WHVFGTXIWML/

Where I live, there is an occasional frost each winter, but that's about the worst of the cold weather. My pineapple plants handle that just fine. If your winter weather is any worse than the occasional freeze, plant your pineapple in a pot where you can take it inside.

That implies that they can grow in a very sunny spot in Southern England.

[gobs]

Yes, pineapples in London and apples on the tropics. You are trying to garden the hard way.

[daveyboy]

Pineapple Pit at The Lost Gardens of Heligan

Interesting!!!