Len Scrivenor was one of my coaches. He was like a god to most top amateur dancers of the day back in the mid seventies. Along with Patric Plumb and Bill Irvine, you would not want to cross him. He had a towering reputation as a top coach and you certainly felt in awe and trepidation of him. I wouldn't want to criticise his book. He was scary. Not quite as bad as Bill Irvine, who threw a salt shaker at me (didn't miss) when he saw a small gap between our midriffs whilst we were going through our whole quickstep routine. We had to do it without holing each others hands or waist. Quite an achievement to undertake.