HEAVY downpours and possible flooding is likely to strike Oxfordshire “within the hour”, according to the Met Office.

Torrential rain and thunder is already affecting the south of England, including London.

Between 20mm and 70mm of rain could fall in the first hour after reaching Oxfordshire, causing travel disruption in some areas.

Met Office spokeswoman Emma Sharples said: “Very heavy and thundery rainfall has been affecting southern parts of England and is now on its way north.

“It won’t be long before it’s with you in Oxfordshire; I would say within the hour.

“There could be some localised flooding and significant travel disruption. It will continue through until rush hour.”