Later Type 26 ships were expected to remain close to Batch 1, but this alternative design proposal would extend them to roughly the Canadian variant's length. The extra space would hold 40 mm guns rather than leave the ship entirely dependent on its missile battery. The proposal is a long-war resilience measure that would retain some defence after the missiles are gone. It is a personal recommendation rather than an announced change to the Royal Navy programme.
Notable Point · 49:21-50:29
A Batch 2 case for 40 mm guns and deeper resilience
The personal Batch 2 proposal would use a slightly longer hull to add 40 mm guns as insurance after the missile battery is exhausted.