I've heard that Sam Smiths haven't put their prices of their beer up since 1901(?) - what you pay for a pint supposedly reflects only tax and inflation. Whether that's true or not I dunno, but they are a very unusual company - they don't even have a website. It's thought they own all their London freeholds, which is why they could shut the Princess Louise on Holborn for months for a high-quality restoration. As far as I know they didn't even do a press release when it was reopened. There are all sorts of odd rumours about Humphrey Smith, the owner, but he never gives interviews.