Former Government chief whip Andrew Mitchell has been ordered to pay interim costs of £300,000 after he lost his High Court libel action over the "Plebgate" incident.
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The showers will be most frequent in the north and west of the country.
Almost 200 people were wounded after an explosion ripped through a venue in the western part of the city.
It comes as Labour leader Jeremy Corbyn reiterated his call for MPs to work together to prevent a no-deal withdrawal from the EU.