International Airlines Group (IAG) - the parent company of British Airways - will be forced to give up a number of take-off and landing slots from Heathrow, as part of the bmi takeover. Routes to Nice, Cairo, Moscow and Edinburgh will be affected.
On gaining EC approval for the deal, IAG chief executive Willie Walsh said it was "great news for Britain" and also for British business and consumers.
The takeover has been bitterly opposed by Sir Richard Branson's airline, Virgin Atlantic, which has complained that the deal gives BA an over-strong presence at Heathrow.
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A top temperature of 11 Celsius (52 F).
The event, which was held at the Dorchester Hotel last Thursday, was attended by representatives of some of Britain’s biggest companies.
Reports in the Daily Mail and the Telegraph said published guidance has been changed for 2018 to only fly the Union flag on Remembrance Day.