Information on update: The warning area has been expanded slightly, mainly to the east. A band of rain is likely to become slow-moving across parts of south and southwest Wales during Monday. Whilst there is still some uncertainty in how quickly this rain slowly moves east across the region, 30-50 mm of rain could fall quite widely with some places seeing 75-100 mm. Given the recent wet weather and saturated ground, the likelihood of impacts is higher. For further details see https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings

Persistent rain will become heavier on Sunday evening, with 20-30 mm falling by midnight in places. This will lead to a chance of some flooding and travel disruption. For further details see https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings