From the beginning of Ed Davey's speech
If businesses don’t have confidence in the security of energy supply, their costs go up.
Higher insurance premiums, expensive back-up systems.
From the end of Ed Davey's speech
Demand Side Balancing Reserve will not force any single business or household to switch off or reduce their electricity.
It is entirely voluntary. Nobody will get cut off. No economic activity will be curtailed.
This is about rewarding volunteer businesses. With the flexibility to reduce their use of National Grid supplied electricity. At peak times only. If called upon.
By changing a shift pattern maybe. Or switching to on-site generation rather than relying on the Grid.