They characterize the Hornsea and Little Barford trips as to "not be expected to trip off or de-load in response to a lightning strike. This therefore appears

They characterize the Hornsea and Little Barford trips as to "not be expected to trip off or de-load in response to a lightning strike. This therefore appears to represent an extremely rare and unexpected event." Looking at the timeline, both of those events are logged within 1 second of the strike. To me, with even a little bit of experience with systems having complex interacting components, it seems vastly more likely that there is some unknown interaction rather than pure chance. I would imagine the prior probability of either of those two going offline is very low, so the probability of both independently going offline within one second of a potential causal event seems vanishingly small.