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The Mail does seem incenced about the large sums of money Sir Geoffrey is earning.
It speaks to the famous story where Lord Beavbrook (ironically a newspaper magnate himself) speaking with an American actress and asking if she would 'live with' (these were more restricted times) a man for a million dollars. When she said she would, his lordship asked her if she would do the same for five dollars, the lady was angry and replied 'Five dollars? What sort of a woman do you think I am?' His lordship relplied 'We have already established what sort of a woman you are, we are just arguing about the degree'.
The Mail therefore leans leavily on the million-plus fees Sir Geoffrey is earning, and the territories in which he is earning them - but as I pointed out in my OP, he appears to be acting within regulations, notwithstanding using his parliamentary office for outside business, which is under investigation, and therefore an accusation of which he is innocent until proven guilty.