Alterations, by Michael Abbensetts, follows a Guyanese tailor as he tries to establish himself on Carnaby Street The National Theatre's decision to stage a work by a "pioneering" and "forgotten" black British playwright should be the start of a revival of similar overlooked work from the 70s and 80s, according to the creative team behind the project. Director Lynette Linton and writer Trish Cooke will bring their rev…