Brits are set to sizzle in highs of 25C by Friday, with the weekend likely to be "very warm" as summer finally arrives - though perhaps only briefly.
The weather will start off fairly miserably this week for many, with cloud and drizzle before heavier outbreaks of rain strike by midweek - though London is expected to hit 23C today.
And temperatures will slowly start to build across the south as the days go on, with the weekend set to be a scorcher, according to forecasters.
BBC meteorologist Nick Miller said the week "will start with low pressure" with an increased chance of rain from midweek before high pressure helps to settle things down.
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