Deputy prime minister Oliver Dowden is taking questions from Labour deputy Angela Rayner as the pair fill on for their party leaders at PMQs.
Rishi Sunak is out of the country as he attends a trip to Germany to strengthen the UK’s defence ties with the nation.
It follows a commitment by the Prime Minister to increase military spending in the UK from 2% to 2.5% by the end of the decade.
Economists at the Office for National Statistics (ONS) said the funding, which the government says amounts to £75bn, would likely come from cuts in other areas.
Rayner takes over from Keir Starmer at PMQs amid a row over whether she should have paid capital gains tax on the sale of her former council house a decade ago.
The Tories have reported the Labour deputy leader to the police who said they are investigating the issue.
She denies any wrongdoing.
Follow STV News on WhatsApp
Scan the QR code on your mobile device for all the latest news from around the country
