The Porterhouse is always a favourite
Although it can be a bit expensive.
I'm presuming you're looking for places in the centre; Soho/Covent Garden/etc?
I also very much like the Red Lion on Kingly Street.
And, frankly, there's not much wrong with the Shakespeare's Head on Kingsway, although it's a Wetherspork.

If you're looking at places in the City, I'd recommend the Globe on Moorgate: nice pub, good pool tables and sofas upstairs.
( Gizmo.mp3 does not exist, Sat 3 Mar 2007, 14:55, archived)

Thank you,
I will look these up.
(MooCow_Byter, Sat 3 Mar 2007, 14:56, archived)