There is a dusting of snow on the downs. Traffic is at standstill at Woodingdean near Brighton.
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The video, obtained by ITV News, shows scores of migrants desperately trying to board lorries in a restricted area within the tunnel.
The grass pollen risk will be very high during warm, sunny weather. Weed pollen will also be airborne
Dry and sunny with long spells of sunshine in the south east and feeling hot