'Mysterious' black door appears on Sonning BridgeTo play this video you need to enable JavaScript in your browser.This video can not be played'Mysterious' black door appears on Sonning BridgeCloseA black door has been placed on a buttress of the Sonning Bridge in Berkshire.SubsectionBerkshirePublished22 August 2016Shareclose panelShare pageCopy linkAbout sharingRead description