That’s 3 years exactly (incl. a leap year).
Yes we did shoot over 3 years but not everyday.
Pre production started in earnest March 2010 with casting in May and rehearsals throughout June of that year; the aim was to shoot the bulk of the warehouse interiors during August 2010 and then the location scenes in September 2010.
During this period the script was being constantly revised with actorís dialogue/ comments from rehearsals put in place and comments from script consultant Stephen Ridley.
Filming began at the Warehouse in Aldgate East on the 21st of August 2010 with the first scene, the family turning up to the warehouse for the first time. Day shoots continued until Thursday 26th of August 2010 when we switched to night shoots until the end of the shoot on Sunday 29th August. The climatic ending at the artistís residence was shot on the last two days of the shoot but these scenes where canned and were eventually filmed in May 2011.
Having still scenes to shoot in the Warehouse the week in September, originally for location shooting, was used for pickups, which were filmed from the 18th September 2010 to the 24th of September 2010.
Most of the location scenes were shot between 22nd April and 4th May 2011 (Cheers Will and Kate) and additional days on 23rd July 2011 and a two more blocks 9 -11th of March and 13th to 16th of April 2012.
See the blog: There’s Nothing You Can Do About a Beard! for the reason to some of the delays.
So at the moment the production for the Warehouse has lasted 38 shooting days.
Warehouse days 16 days
Location Days 22 days