So do your Iains, the Union Flag is only correctly named a "Union Jack" when it is flown on the Jack Staff of a ship

That may well explain the orgin of the term but present usage is either Union Jack or Union Flag regardless of how or where displayed. Only vexillologists make a distinction.AS wiki states" Even if the term "Union Jack" does derive from the jack flag (as perhaps seems most likely), after three centuries, it is now sanctioned by usage, has appeared in official usage, and remains the popular term. The BBC website disregards the term "union flag" because of its "great potential for confusion", preferring union jack (in lower case) The Merchant Shipping Act 1995 refers to the national colours of the United Kingdom as "the Union flag (commonly known as the Union Jack)".

As you so like to malign the illustrious font of all knowledge Guido Fawkes. Here are a few tasties to redress the balance:
labour mp charged perverting course of justice

sex abuse allegations labour
Elliot Morley
Former environment minister and Labour MP for Scunthorpe
Offence – Pleaded guilty to fraudulently claiming £32,000 of parliamentary expenses.
David Chaytor
Former Labour MP for Bury North
Offence – Pleaded guilty to three counts of false accounting relating to approximately £18,000 of parliamentary expenses.
Eric Illsley
Former Labour MP for Barnsley Central
Offence – Pleaded guilty to fraudulently claiming £14,000 in parliamentary expenses.
Jim Devine
Former Labour MP for Livingston
Offence – Found guilty of dishonestly claiming £8,385 in parliamentary expenses.

Never learn do you?          John 8:7