How would a "motivated" crew have dealt differently with a signalling failure? It's totally beyond the control of anyone on the train.
The minimum rest periods are there for good reason. History is littered with examples of disasters in transport and industry due to people working longer hours than is sensible, with not enough rest.
Ensuring the crew are properly rested, safe to perform their duties and are not sleep deprived and grumpy is putting the passenger first, IMO.
Tend to agree rest periods are required and its for good reasons and I had anticipated such a response . Motivated only to the extent that for the sake of an hour there may be scope to ensure customers are not tired and grumpy by delays . So how long have they had since finishing the delayed shift? I am not saying the delay is their fault , just how one mitigates the knock from the signaling fault .