On the question of whether or not W.O. Donaldson should have been prosecuted; comparing him with others . Each case must be considered on its merits. or some might say its lack of merit.
In the 1994 edition of " The Code For Crown Prosecutors" There is "The Public Interest Test"
Quote: In 1951, Lord Shawcross, who was Attorney General, made the classic statement of public interest,which has been supported by Attorneys General ever since: "It has never been the rule in this country --I hope it never will be-- that suspected criminal offences must automatically be the subject of prosecution"
This case was one where I think prosecution was well deserved.