From a Chedworth resident on 31st August:
“This morning a young lad called here brandishing an ID card carrying a large bag – saying he was from the youth offenders service & trying to get a job – offering cleaning stuff, garden gloves etc for sale.”
A neighbour also saw the same lad, assumed he was genuine but researched this further. He discovered that apparently, these young men come from Nottingham and other northern areas hence the term ‘Nottingham Knockers’.
This website gives you more information.