Angry parents have staged a demonstration at the headquarters of Rhondda Cynon Taff council over plans to cut the amount of time that children spend at school nursery classes. The move is one option being considered by councillors who have to save £56m.
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The peer will attack Prime Minister Theresa May for failing to represent the 48% who voted in favour of Remain.
Paul Flynn, MP for Newport West, will open the debate in Westminster Hall.
It will represent another boost to the region, after the announcement Deca Sealand was chosen for a repair hub for defence aircraft.