Fog across the south east has disrupted flights at Heathrow, Gatwick and City airports. The delays in London come as people travelling for Christmas are warned to expect disruption across the UK as Storm Barbara approaches. The Met Office said the worst of the weather is expected on Friday and Saturday, with gusts of up to 90 mph forecast in parts of Scotland.<br/><br/>Meanwhile, a giant dust cloud has hit Western Australia ahead of the nation's first cyclone of the season. Cyclone Yvette is expected to make landfall in Australia's northwest over the Christmas weekend. Meteorologists have issued a severe weather warning, predicting wind gusts of 160 km per hour, heavy rain and possible flash flooding.

Fog across the south east has disrupted flights at Heathrow, Gatwick and City airports. The delays in London come as people travelling for Christmas are warned to expect disruption across the UK as Storm Barbara approaches. The Met Office said the worst of the weather is expected on Friday and Saturday, with gusts of up to 90 mph forecast in parts of Scotland.<br/><br/>Meanwhile, a giant dust cloud has hit Western Australia ahead of the nation's first cyclone of the season. Cyclone Yvette is expected to make landfall in Australia's northwest over the Christmas weekend. Meteorologists have issued a severe weather warning, predicting wind gusts of 160 km per hour, heavy rain and possible flash flooding.