Manchester sewermen share their knowledge of the nation's poor diet; the behaviour of patrons at Cheltenham Racecourse is exposed; two window cleaners face the terrifying task of keeping a huge national icon absolutely spotless.

In London, a team of domestic maids discovers how fussy some homeowners can be about dirt and grime; pest controller Jim deals with a house that pigeons have overrun; the Manchester sewers are clogged up with things that people shouldn't put in them.