Marc Owen, director of UK Border Agency operations at Heathrow, has told BAA that the leaflets are "inappropriate" and that ministers would take "a very dim view". Mr Owen also told BAA to prevent passengers taking pictures in the arrivals hall.
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Most places will have a sunny day, but feeling chilly, with the chance of a little more cloud in northern areas.
If approved the increase would trigger a county-wide referendum.
Most places will have a sunny day, but feeling chilly, and cloud will increase in eastern counties later.