Miss Brown was the bored, gum-chewing Liverpudlian assistant at Billy Bargain's Supermart, a new enterprise that opened on Rosamund Street in October 1961.
Valerie Tatlock tried the new store and was ahead in the till queue of Ena Sharples who told Val that the pears she was buying were "cheap and nasty", earning her a black look from Miss Brown. When it was Ena's turn to be served, she found fault with the tilling as it was too fast for her and argued with Miss Brown and assistant Mr Jackson over the labelled price of a tin of condensed milk. Having lost that point, Ena insisted on setting the speed of the tilling in order that she could keep an eye on the prices charged and questioned how a tin of "Pussy Fresh" cat food had found its way into her basket. The final showdown came when the total charge of 18/2 was quoted, with Ena saying her calculation was for 17/6. As Miss Brown insisted that the till couldn't be wrong, Ena upended her shopping bag of all the goods, saying they would put them back on the shelves themselves and stormed out.
- Credited as "Cashier", the character's name was given in dialogue.