Oil has washed up on 200 beaches and the Brazilian authorities are investigating.

Reality Check

Mr Farage has been talking about concentrating on a free trade agreement with the European Union.

What could that involve? Reality Check correspondent Chris Morris explains.

Reality Check

Nigel Farage has attacked Boris Johnson's withdrawal agreement.

You can read more about what is in Mr Johnson's deal here.

Reality Check

Nigel Farage has repeated his claim that five million Labour supporters voted to leave the European Union.

There are no precise figures for this because general elections and referendums are secret ballots.

But most estimates put the figure between three and four million.

You can read more about it here.

Pakistan has a history of fatal railway accidents.

Jeremy Corbyn says the Conservatives have slashed taxes for the richest. Is that true?

Reality Check

Jeremy Corbyn made two healthcare pledges in today's speech - both of which Labour has mentioned before.

He said Labour would bring England in line with the rest of the UK by introducing free prescriptions for everyone. At the moment some people in England (who are eligible for certain benefits, under 16 or over 60) get free prescriptions, but everyone else pays £9 per item.

Wales, Northern Ireland and Scotland all scrapped prescription charges between 2007 and 2011.

In 2017-18, NHS England brought in £575m from prescription charges but Labour acknowledged the cost of this policy might be more like £750m if more people take up prescriptions as a result.

Labour also called for free personal care for over-65s in England, something that is already in place in Scotland, and for over-75s in Northern Ireland.

According to the King’s Fund, external, this would cost about £6bn extra a year.

The question - for all parties - is how they will pay for this or any other major changes to social care.

The health service was a major talking point at Prime Minister's Questions.

Boris Johnson claims that delaying Brexit instead of leaving on 31 October will cost an extra £1bn a month.

Election organisers may need to find temporary lighting for polling station entrances and gritters.

The EU has accepted the UK's request for a Brexit delay for the third time - so how does the process work?

The country is observing a public holiday to protest against sanctions.

There have been previous examples of Nato members working alongside Russia - despite political tensions.

Some European countries have suspended arms sales to Turkey, so where does it gets its weapons?

China and the US have been imposing trade tariffs, but how far will this go?

Protests at rising metro fares have widened to reflect anger over living costs and inequality.

The US government has banned the import of rough diamonds, but Zimbabwe says the claims are unfounded.

What does Mr Johnson's new agreement say about environmental standards or workers' rights?

Elizabeth Warren made the claim and accused Facebook of taking cash, "no questions asked".

The Liberal Democrats say they would stand on a platform of revoking Article 50 in the next election.