Has anyone information or marketing on a British Iconic brand from the seventies called Simon?

Simon became a major fashion style item throughout the 1970’s in Menswear clothing
The Simon brand was characterised by its slim fit silhouette, sharp collar, long button placket, two buttoned breast pockets and the use of innovative plain and patterned stretch fabrics of the day.
The Simon shirt was a seminal piece of northern soul dress at the time.
any information or marketing information would be helpful in my research