Lester Piggott was jailed after failing to declare income to the Inland Revenue of 3.25 millon pounds . The biggest sum on the charge sheet related to an alleged omission of 1,359,726 pounds from additional riding income. Another alleged that for 14 years, from 1971, he omitted income of 1,031,697 pounds from bloodstock operations.

Piggott was convicted of the tax fraud in 1987 and sentenced to three years in prison, but served just over a year.
Piggott had the courage of his convictions and did jail time instead of paying any fine.

I witnessed LP win on Plegdon Green in a selling race at Pontefract almost 40 years ago. On the uphill turn for home Piggott brought the horse through from the back of the field to win quite comfortably.
The horse was then sold on to go jumping.