Zac Goldsmith MP joined the Mayor and hundreds of others in Barnes at a rally against Heathrow's third runway.
Richmond Council, which serves residents who live under the airport's flight path, is currently leading a referendum on the future of Heathrow.
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The London property market is expected to be the hardest hit as buyers sit it out to see how the economy will be affected.
The former London mayor paid tribute to David Cameron just hours after the Prime Minister announced his resignation.
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