Diesel submarines or extra-large uncrewed vehicles

Should the Royal Navy invest in diesel-electric submarines?

He would like that capability back, but extra-large uncrewed underwater vehicles are the more affordable fit for the present force.

The Royal Navy's exit from the diesel-electric submarine field is treated as a loss. Restarting a conventional submarine force would require funding and a place in the current force structure. Extra-large uncrewed underwater vehicles are presented as the practical substitute the service can afford. They fit more readily into existing plans than rebuilding an SSK arm.