There was a late 19th early 20th century tradition called 'stump speeches' where socialist thought was addressed in a comic monolgue. They appear to be widespread in Australia as I have collected several. I am certain they would apply to the UK too. If you go to my Australian Folklore Unit site www.warrenfahey.com and search Joe Watson you will find two such stump speeches 'Rafferty & Cafferty' is my favourite.