Any kind of moderate disruption - I believe the official definition is delays of more than 10 minutes per train and expected to continue for more than 30 minutes; or any kind of disruption that closes a line entirely; necessitates the implementation of one of the industry disruption plans. None of the operators really get a choice in its implementation. NR tell us it’s happening and we then work to it.
These dictate service reductions to maximise use of the available infrastructure and, as I understand, trigger a suspension of Crossrail’s points-based performance regime described above.
But these plans are incredibly disruptive - they certainly break Crossrail’s performance regime as many of them leave stations entirely unserved in either one or both directions while in play. It is plainly evident reading these plans that delay payments, or similar, were not remotely in the thought process. The aim of them is to force as many trains through the bottleneck as possible, to run as normal service as possible either side of the issue.
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Crossrail are heavily incentivised to continue serving the Airport as they are the sole operator between T2/3 and T4; and Heathrow Airport place a significant emphasis on keeping the Airport moving even during disruption on the mainline for inter-terminal traffic. Indeed during serious disruption on the mainline they will normally call on HEx to operate a CTA/T5 shuttle even if trains aren’t able to run to Paddington, and we will normally oblige if resources allow. The expectation is on Crossrail to do the same for T4 but I haven’t yet seen it happen in anger; that could just be me though.