A low pressure system is moving towards Ireland and Scotland and will cause strong winds and rainfall during the day, especially from late morning (Fig1).
Fig1. Synoptic chart valid for 9/11 midday (Met Office).
During the night some showers are expected on the Irish Channel, Wales and Western Scotland, instead bright conditions on the south-east. During the morning some showers still possible in these areas. However, from late afternoon moderate/intense rainfall will move eastward from the Atlantic with rainfall on Northern Ireland, Wales, Scotland, Cornwall and by evening also England (with the south-east hit especially on late evening). However, the most intense precipitation will be on the west and south (Wales, northern Ingland ,western Scotland, Cornwall and south-east), instead lighter on the central-northern east coast.
The minimum temperatures will be steady in Scotland (5-8°C), and increase in England (5-13°C, highest values in Cornwall). Also the maximum temperatures won’t change, with values (6-10 °C)in Scotland and (8-13°C) in England.
The winds will be southerly everywhere until afternoon, when they will turn westerly-south westerly. The strongest winds (moderate/strong) will be on the Irish Channel and English Channel (Cornwall) from late morning to late afternoon, instead in the evening will be moderate on the east and Northern Scotland.