Warner Bros. Studios has written to people nearby telling them not to be alarmed by loud bangs in the coming weeks.

The film production complex in Leavesden will be carrying out test controls of special effects from today including gunfire, pyrotechnics, smoke and “bang” type noises.

The warning to residents was issued because the studio is working on a current production in its rear lot.

All testing will take place on weekdays only, between 10am – 6pm.

Three Rivers District Council and all relevant authorities have been notified.

Email: residents@wbsl.com

Telephone: 020 3427 7777