6 participants in the Diamond Jubilee river pageant were taken to hospital after becoming very cold and wet, the ambulance service said. Another 40 were treated by medics on the banks of the Thames after the parade was beset by heavy downpours. Their conditions are not said to be serious.
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The morning sunshine will be replaced by more cloud and perhaps a little rain later.
Cloud and occasional light rain or drizzle spreads eastwards through the morning.
A sunny evening followed by a dry night with largely clear skies.