As reported previously by The Silhillian, some residents have complained that the merchants’ loudhailers are disturbing.
Police and council bosses have said they are challenging the merchants.
Reporter Katie Rowlett is particularly looking to interview night shift workers for a piece for the BBC programme.
Contact her at katie.rowlett@bbc.co.uk.
A merchant was in Knowle again on Sunday afternoon, Brandon Tool Hire. Listen to the recording of the loudhailer below.
