The first flight of the working week to 2 important hubs cancelled. Must be many disatisfied passengers and the compensation bill must be huge. How does this airline survive?
Being half term, the loads on these 'business' flights were possibly quite light of course, so maybe not viable in the current climate of higher fuel prices.
However, I wonder whether the recent BM/AF codeshare announcement, albeit for domestic French routes only, is indicative that BM have fallen out with LH, and these cancellations are a further symptom of that situation.
I guess from a LH/SN perspective the question has to be at what point does it become more cost-effective to run their own services, or change to another codeshare partner. However, with Brexit on the horizon maybe LH group are planning to let the service wind down of its own accord? After all, BRS is a very small dot on the LH landscape and any reputational damage etc. is unlikely to have much impact in the wider scheme of things.
The advantage of the ER3s/4s is that they are relatively small, therefore suited to multiple daily frequencies, which provides some contingency in the case of a cancellation (for whatever reason), unlike a 2-weekly or 3-weekly service where one cancellation can seriously screw up travel plans. This is still a major reason why business travellers in particular gravitate to LHR, so were BM to fold it would probably be a greater impact to BRS than to LH group.
That said, KL can achieve multiple daily frequencies (at presumably good LFs) with larger Embraers, so it can be done, and presumably KL would be the main beneficiaries if BM disappeared.