Firefighters were called to a sports ground after a fire broke out in an agricultural shed.
Fire crews were alerted to the blaze, in Forest Road, Hainault, at around 4.30pm on Wednesday afternoon.
When they arrived on scene, they extinguished a shed, which had caught alight.
Crews from Hainault, Iford and Woodford stations were dispatched to tackle the blaze.
The cause of the fire has yet to be determined.
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