Mya Olaye (Violet) and Tom Klenerman (Charlie) in a scene from Charlie and the Chocolate Factory, inside the factory itself. There are four Charlies in all, sharing different performancesPhotograph: Helen MaybanksJay Heyman (Mike), Iris Roberts (Mrs Teavee) and Kate Graham (Cherry) in a key scene – the announcement that Mike Teavee, who in this production hails from suburban America, has won one of the five golden tickets Photograph: Brinkhoff/MoegenburgDouglas Hodge's Willy Wonka and assorted children and relatives (including Nigel Planer's Grandpa Joe, top-middle) enter the mysterious world of the Wonka factoryPhotograph: Helen MaybanksAugustus Gloop (Harrison Slater) and Jasna Ivir (Mrs Gloop) dwell on the consequences of winning another golden ticket, complete with Bavarian-style band Photograph: Helen MaybanksA rare shot looking directly down from the Theatre Royal's huge lighting grid, looking forwards to a vertical flat in the direction of the auditorium (to the top of the picture), and showing behind one of the sets, with racks of costumes (at the bottom)Photograph: Tristram KentonA piece of scenery – with nut-sorting squirrels on top – is manoeuvered into placePhotograph: Tristram KentonReady for curtain-up? The cast of Charlie and the Chocolate factory during stage rehearsals: Back row; Clive Carter as Mr Salt, Nigel Planer as Grandpa Joe, Douglas Hodge as Willie Wonka and Iris Roberts as Mrs Teavee. Front row: Ellie Simons as Veruca Salt; Jack Costello as Charlie Bucket and Jay Heyman as Mike TeaveePhotograph: Helen MaybanksDirector Sam Mendes leads the first day of rehearsalsPhotograph: Helen MaybanksBedmates: Nigel Planer (Grandpa Joe) and Roni Page (Grandma Josephine) in rehearsalsPhotograph: Helen MaybanksDouglas Hodge (Willie Wonka) and director Sam Mendes during rehearsals Photograph: Helen MaybanksSing when you're winning: Douglas Hodge rehearsingPhotograph: Helen MaybanksTout sweet: Kate Graham (Cherry, Lovebird Woman) and Ross Dawes (Jerry, Lovebird Man)Photograph: Helen MaybanksOn the other side of the mattress: Billy Boyle (Grandpa George) and Myra Sands (Grandma Georgina), in rehearsals Photograph: Helen MaybanksAll together now: members of the company in rehearsal Photograph: Helen MaybanksAll the details, down to the slippers: set and costume designer Mark Thompson's sketch for Grandpa Joe and CharliePhotograph: Mark ThompsonMr and Mrs Gloop and their son, Augustus: Mark Thompson's costume sketchPhotograph: Mark ThompsonA musical in miniature: Mark Thompson's set model box Photograph: Helen MaybanksThe hard hats are out: building the complex stage for Charlie and the Chocolate Factory at Theatre Royal Drury LanePhotograph: Helen Maybanks'Oompa, Loompa, doom-pa-dee-do. I have a perfect puzzle for you.' The Oompa-Loompas make an appearancePhotograph: Brinkhoff/MoegenburgThe search for the golden ticket: Charlie Bucket (Jack Costello), left Photograph: Brinkhoff/MoegenburgThe anticipation is overwhelming: the gates of the Wonka factory are set to openPhotograph: Brinkhoff/Moegenburg