The grant may not be massive compared to the current market cap,...

The grant may not be massive compared to the current market cap, but I think the major promise here is that the more integrated into defence contracting the company gets the more likely they'll also be engaged by US and Asian contractors and defence departments. This announcement will be less about the specific grant, and more about what the award of the grant means for the business's trajectory. A vote of confidence from the defence sector will attract other investors presumably. Here's hoping!