Stuart, My stance would be to simply follow the NEC .

Here Clause 32.1 clearly identifies what needs to be shown in the Revised Program.

specifically, any other Changes , my view that the intent of the NEC3 and it is planning requirements is to deliver to the Client an updated snap shot of the "status" of the project as of that agreed date. This it assist ALL parties to the contract and in the spirit of the Contract to assess EW in a Risk Reduction and manner of mitigation to see how best possible to meet the Contract Data Dates.

This being said a CE event can occur with out an EW , Clauses 61.3 and 61.4 . A CE is an event that has occurred, one cant raise an EW for an Event that has occurred.

An Early Warning by its own definition 16.1 is the notification by one party to the other as soon as they become aware of a matter which could . It would be used in the forward planning and value engineering that the potential exists for an event and the EW is the mechanism by which the parties work together to reduce or negate the event.

Hence why I belive that all event should be captured on the revised Program

In my view, the programme should always show the contractor's best estimate for an accurate schedule, and as such should include CEs.

The only thing the client's acceptance has an effect over programme-wise is the contractual end date.

In my opinion, yes, as it still constitues risk unless you are able to mitigate the exposure to the delay/time impact.