The UK will enjoy one last gasp of summer next week with temperatures even reaching as high as 31C in some places.

A tropical plume of air will send the mercury sky-rocketing before temperatures turn cooler.

The Met Office has predicted September will be one of the warmest on record after a mixed-bag August.

Sunday will be dry and sunny for most in England and Wales with temperatures in southern England roughly 20C.

Monday will see the mercury start to climb rapidly with highs of 29C caused by a “tropical continental air pushing up from a southerly direction in combination with light winds," predicts Met Office forecaster Bonnie Diamond.

The hot weather is set to continue on Tuesday and Wednesday, with highs of 28C or 29C across most of southern England, including London.

Northern England and Wales will be cooler, but will remain warm and dry with average temperatures of 22C.

Met Office forecaster Bonnie Diamond said: "It definitely feels like one last blast of summer even though we are, meteorologically speaking, in autumn."

It comes after the Scottish Environment Protection Agency (SEPA) confirmed that it had issued ten regional flood alerts for Scotland over the weekend period.

Mark Franklin, SEPA’s Duty Flood Manager, said: “With yet another wet weekend forecast for much of Scotland, SEPA has issued ten regional flood alerts.

“Persistent, and occasionally heavy rain will bring a gradual build-up of surface water and rising river levels during Saturday evening and into Sunday across many parts of the North, West and Central Highlands.

"This is likely to result in localised flooding of land and roads, as well as some transport disruption.

"Parts of Argyll, Easter Ross and Lochaber could experience flooding affecting communities and disruption to infrastructure due to the heaviest rain – and people living, working and travelling in these areas are advised to ensure they have signed up to Floodline and are prepared to take action to protect property."

However, despite the good weather only groups of six will be allowed to meet up both indoors and outdoors in England.

From tomorrow, the so-called "rule of six" will be introduced, meaning groups of more than six people cannot meet socially.

Social distancing is more important than ever as Covid-19 cases continue to increase

Huge crowds were seen gathering for another boozy night out on Saturday ahead of the new coronavirus restrictions.

Authorities up and down the country were concerned some revellers would take the opportunity for a big weekend blowout before restrictions came into force.

John Apter, from the Police Federation of England and Wales, had warned earlier: "There is a real risk some members of the public will take advantage of the current situation and treat this weekend as a party weekend ahead of the tighter restrictions being introduced on Monday."

The mercury could reach as high as 31C in places

It comes after Health Secretary Matt Hancock singled out young people for criticism, saying transmission among teems and people in their 20s and 30s were driving fresh outbreaks.

UK 5 day weather forecast

Today

Many areas fine and dry with some warm sunshine, especially across England and Wales. Scotland cloudier at first with some early rain, heavy at times in the west, but this becoming confined to northwest Scotland later. Windy in the north.

Tonight

Cloudy with further outbreaks of rain for northwest Scotland, but rain here becoming lighter than during the day. Dry clear spells elsewhere and a few fog patches by dawn. Mild.

Monday

Most areas dry with plenty of warm sunshine, conditions hotter than on Sunday across England and Wales. Cloudier with rain at times over far northwestern Scotland.

Outlook for Tuesday to Thursday

Many places dry and warm on Tuesday, hot across the southeast. A few showers possible in the north and west. Turning cloudier and cooler from the north Wednesday and Thursday.