Sir Keir Starmer will attempt to pitch Labour as the “party of national security” after Jeremy Corbyn’s era.
The Labour leader will reaffirm his commitment to a “nuclear deterrent triple lock” as well as his ambition to increase defence spending to 2.5% of gross domestic product (GDP), a measure of the size of the economy.
Sir Keir said: “National security will always come first in the changed Labour Party I lead.
“Keeping our country safe is the bedrock of stability that the British people rightly expect from their government.
“My message to them is clear: Labour has changed. No longer the party of protest, Labour is the party of national security.
“The excellent former service personnel that are standing as Labour candidates are a testament to that change.”