Mr Williams was a potential customer of S & T Garage who was put off from having his car serviced by the sight of another vehicle outside the premises left by disgruntled client Mr McKellar, complete with a note telling all passers-by of his dissatisfaction with the firm. Brian Tilsley lied to the man that it was just a pal's idea of a joke but Mr Williams told him that when it came to his car, he didn't possess that sort of sense of humour, and left.
- Credited as "Man", the character's name was given in dialogue.