LONDON — Dominic West (“Appropriate Adult,” “The Wire”) will play Henry Higgins in a major U.K revival of “My Fair Lady” at the revivified regional house Sheffield Crucible opening in December.Helmed by a.d. Daniel Evans, who directed West in the 2011 Crucible production of “Othello,” the production of Lerner and Loewe’s tuner will also star Carly Bawden (“The Umbrellas of Cherbourg”) as Eliza. Designed by Paul Wills with lighting by Tim Mitchell and choreography by Alistair David, the production previews Dec. 12 for a seven-week run, with a Dec. 18 opening. In further legit casting news, Mark Gatiss (BBC/Masterpiece Theater’s “Sherlock”) will play King Charles I in the world preem of “55 Days,” Howard Brenton’s drama about the events leading up to the king’s execution in 1649. The production runs at London’s Hampstead Theater Oct. 18 – Nov. 24. Also in London’s fall season, Pip Carter will play the British poet Edward Thomas and Shaun Dooley play U.S. poet Robert Frost in the world preem of “The Dark Earth and the Light Sky” at the Almeida Theater. Written by Nick Dear (NT’s “Frankenstein,”) the bio-drama investigates the effects of their friendship on the brink of World War One. Helmed by Richard Eyre (“Notes on a Scandal”) and designed Bob Crowley with lighting by Peter Mumford, the production runs Nov. 8-Jan. 12, 2013.