Extending the concealment scenario to battlecruisers

Would battlecruisers qualify for the fictional cruiser concealment devices, and what if they did?

Probably not under the original rule; if included, Renown could close during pursuit and Repulse could evade aircraft.

A follow-up asks whether battlecruisers count under the fictional cruiser rule. The initial answer is probably not, but the consequences of including them are explored. Renown could conceal its approach during pursuit after Norway and obtain a closer firing position. Repulse could use concealment to evade attacking aircraft long enough for their endurance to become a constraint.