Defence minister Luke Pollard makes the funding announcement at the Army Aviation Centre in Hampshire.
The prime minister is facing growing pressure to spell out when the funding blueprint will be published.
A subdued economy makes trade-offs and choices over public spending more difficult, Chris Mason writes.
Lord George Robertson, a former Labour defence secretary, will use a speech to accuse "non-military experts in the Treasury" of "vandalism".
The government faces tough questions about the ability to defend the UK, writes Jonathan Beale.
An MP welcomes the investment but says more needs to be done so industry can stay afloat.
The chancellor has stepped in to protect jobs at the helicopter manufacturer in Somerset, the BBC understands.
The scheme will seek to take inspiration from Ukraine's drone manufacturing programme.
Trump has repeatedly insisted that European countries must spend more on defence, and there are signs that has been successful.
