Britain 's heatwave sends ice creams sales soaring - with some vendors seeing a 400 per cent increase in sales . Temperatures forecast to hit 21C tomorrow , with the weather set to be warmer than Ibiza , Dubai and elsewhere . But the balmy weather could be coming to an end , with clouds , wind and a spot of rain forecast for Thursday . Showers predicted to hit London on Friday as tens of thousands of runners take part in the London Marathon .
Britain 's heatwave sends ice creams sales soaring - with some vendors seeing a 400 per cent rise in sales . Temperatures forecast to hit 21C tomorrow , with the country set to be warmer than Ibiza , Athens and Barcelona . But the balmy conditions could be coming to an end , with clouds , wind and a spot of rain forecast for Thursday . Showers predicted to hit London on Sunday as tens of thousands of runners take part in the London Marathon .