Glenda Jackson, after years away from the stage as a Member of Parliament, is set to play King Lear. See the story here.
If you are interested in details of productions of Shakespeare’s plays on the London stage from 1 January 1890 through 31 December 1959, check out http://www.jpwearing.wordpress.com. A series of calendars provides what plays were performed, where, and by whom. Bibliographies of reviews, commentaries, and other useful information is also provided.
There’s a very interesting interview of Derek Jacobi as he prepares to play King Lear in London. After the London, the production will tour the British provinces and then end up on Broadway in 2011.