Cardiff will host a stopover during the 2018-17 Volvo Ocean Race, organisers have announced.
It will be the first time the round-the-world race has visited Wales.
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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.