LONDON — World preems of new play “Bull” by Mike Bartlett (“Cock”) and original tuner “This Is My Family” by Tim Firth, co-writer of the film “Kinky Boots,” headline the 2013 season slate at U.K. regional theater powerhouse Sheffield Theaters.“Bull,” Bartlett’s caustic study of playground bullying tactics in office politics, is helmed by Claire Lizzimore, designed by Soutra Gilmour (“Cyrano de Bergerac”) and lit by Peter Mumford. Running Feb. 6-23 in the venue’s studio space, its press opening is set for Feb. 11. The same space will host “This is My Family” (June 19-July 20), a new musical comedy by Firth, whose record-breaking stage adaptation of his movie “Calendar Girls” became the U.K.’s most financially successful play. Helmed by Sheffield a.d. Daniel Evans, the new show is about teen who wins a dream family holiday competition by pretending the family are ideally happy when in fact they are nothing of the sort. Designed by Richard Kent and lit by David Plater, the show stars Bill Campion, Janie Dee and Sian Philips. Further season highlights include a mainstage revival of D.H. Lawrence’s drama “The Daughter-in-Law,” helmed by Paul Miller and starring Lynda Baron and Claire Price (Feb.27-March 23) and a new production of Alan Bennett’s Tony winner “The History Boys” (May 16-June 8) by rising Brit helmer Michael Longhurst, whose Roundabout Theater Company production of Nick Payne’s “If There Is I Haven’t Found It Yet” starring Jake Gyllenhaal has recently extended its run in Gotham until Dec. 23. The productions join the previously announced “My Fair Lady” (Dec. 12-Jan. 26) starring Dominic West (“The Wire”) and Carly Bawden, plus Simon Beaufoy’s new stage version of “The Full Monty,” both helmed by Evans, the latter embarking on a national tour after its Feb. 2-23 Sheffield bow.