I would question whether the diversion was "handled well"
The problem was apparantly first identified just north of Belfast, yet the diversion was to BHX. Disruption was caused to thousands of passengers (including myself, inbound on KL1431)
The possibility of a runway closure was presumably predictable with a hydraulic issue, and yet a single runway airport was selected.
Why not MAN with two runways where the subsequent disruption would have been minimised?
Could it be because Norwegian fly from BHX and therefore have some "infrastructure" to handle the diverted passengers. If so, their own company's operational convenience was allowed to cause huge disruption to passengers of many other carriers. This is simply wrong and should not be allowed.