If Rodney suffered an engine casualty before Bismarck

What happens if Rodney suffers an engine casualty while closing to engage Bismarck?

Renown would be the nearest heavy reinforcement, allowing King George V to close, a slowed Rodney to fire at short range, and Renown to support from safer long range.

The engine casualty changes Rodney's mobility but not necessarily her ability to contribute heavy gunfire. A layered engagement would have King George V close for effective fire, Rodney use whatever movement remained to fight at direct range, and the more vulnerable Renown stay back for long-range support. The arrangement preserves a reserve against further mishap while still concentrating fire.