General election 2017: Corbyn attacks Tories over 'super-sized' classes
Labour says children are being crammed "like sardines" into "super-sized" school classes, as it focuses its general election campaign on education.
Jeremy Corbyn said 40,000 primary age children were taught in classes of 36 or more in England in 2016, blaming "broken promises" by the government.
But the Tories said the Labour leader's comments were "a massive own goal".
They said the Labour-led Welsh government had overseen increases in class sizes in Wales.
Meanwhile, Lib Dem leader Tim Farron is to target Conservative MPs who backed staying in the EU, challenging them to support his bid to stay in the single market.
With under seven weeks to go until polling day, parties are racing to select candidates and prepare for the snap 8 June election, announced by Prime Minister Theresa May on Tuesday.