From Met Office warning...
"A spell of rain is expected to move northeast across southern and eastern parts of England on Thursday, clearing during Thursday night. The track of the heaviest rainfall remains very uncertain, but there is a chance of 20-30 mm falling in 6-9 hours across a portion of the warning area, with a few places perhaps seeing 40-50 mm. Impacts are more likely due to the current very wet ground across the region".