Graeme Yorston from The Principality Building Society says first time buyers are 'critical' to Wales' housing market.
Wales' biggest building society will be announcing its annual results later. It is thought the results will be positive, led by an increase in the number of first time buyers.
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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.