http://news.bbc.co.uk/onthisday/hi/d...00/2477023.stm
Investigations revealed the gun was part of "Project Babylon", the brainchild of Canadian Dr Gerald Bull, who was assassinated shortly before the parts were discovered.
In April 1990 two men - a scientist and a director of the company Walter Somers company - were charged in connection with the "supergun".
However, charges against them were withdrawn suddenly and without explanation in November.
In 1991 after Iraq's defeat in the Gulf War United Nations weapons inspectors working in the country destroyed two "superguns".
A 1992 report on the affair concluded the government had known more about Project Babylon than it had admitted.
British Ambassador's likely return
9. The FCO is concerned that Walker's return to Baghdad has been caught up with factors extraneous to his recall. Originally scheduled to return on April 16, his departure was delayed first by news of the interception of nuclear triggers and now by the supergun controversy. The FCO told us (please protect) that Saudi Ambassador to the US Prince Bandar had convinced "the highest levels of the Government," i.e.,
Mrs. Thatcher, that British Ambassador Walker should not return unless the Iraqis cede something on British detainees. Otherwise the British move would be perceived as caving in to Iraq. Bandar reportedly pledged to seek to convince Saddam Hussein to make some gesture on one of the two long-term British detainees – Daphne Parish (who was sentenced to fifteen years for spying in connection with the Bazoft affair) or Ian Richter (who is serving a life sentence). The FCO believes the possibility of such a gesture is close to nil.
http://www.margaretthatcher.org/document/109446
(Margaret Thatcher made the seemly applications for clemency, and the incident certainly strained the countries’ relationship. But
the Tory government would later be embarrassed by revelations that, before and even after Bazoft’s hanging, it was pushing for closer trade relations and helping British firms skirt the law to ship Baghdad the weapons it would use against British troops in the coming Gulf War.)
http://www.executedtoday.com/tag/daphne-parish/
Here is some Thatcher related information for those who are interested in it.