Police say three 'Nottingham Knockers' have been stopped in Beaconsfield this morning. 

Three people were stopped by officers on Ledborough Woods, Walkwood Ride and Burkes Road on Friday morning. 

'Nottingham Knockers' are believed to be doorstep callers who target areas and offer small household products for sale, according to website, Safe Local Trades. 

Police posted on Twitter to warn concerned residents to report suspicious activity to them.