The UK Health Security Agency will put cold-health alerts in force from Sunday night into Thursday for parts of northern England, BBC Weather reported, after a brief milder spell¹.

BBC said the alerts cover north-east and north-west England and Yorkshire and the Humber from 21:00 GMT on Sunday until 09:00 GMT on Thursday¹. The Guardian, in a later UK news item, also reported that cold-weather health alerts had been issued for parts of the United Kingdom from Sunday night and into the following week².

After Saturday morning temperatures as low as minus 7.2C at South Newington in Oxfordshire, most places were expected to be around 2C to 6C on Sunday morning and largely free of frost, BBC said¹. Showery rain was forecast to spread across much of the United Kingdom on Sunday, with hail and thunderstorms possible in parts of Wales and southern England and a chance of mountain snow in Scotland, according to that account¹.

BBC said heavy bursts could cause local disruption, including blocked drains and localized flooding as wet leaves fall in brisk winds¹. From Monday, colder air was expected to return from the north, bringing frost and fog as rain and wind ease, BBC said¹. Afternoon temperatures around 5C to 8C were forecast for most of the UK, with a noticeable wind chill near eastern coasts¹.

The Guardian's RSS summary framed the same stretch as frosty conditions expected to last until Thursday and said UKHSA had warned of a threat to vulnerable people². WhatsNewPaper could not load the full Guardian article behind that URL, so details beyond that summary are not independently verified here².

The remainder of the week was described by BBC as alternating mild and cold spells¹.

Not medical advice.