Not sure what triggered it, possibly neighbour -who was a right bell end -trying to get me in trouble.
The main thrust was trying to see if my outgoings matched my reported income. only thing they got me on, at the time I was paying my wife £100 a month and I only actually had £50 a month going into an investment account solely in her name (all other accounts were in joint names). Think I ended up paying them a very small sum because of this.
It was about 25 years ago. I genuinely declared all my income at the time and was glad that I was trying to be honest (I don't like lying).