Thanks again DN.

Note your comments re my hotel analogy.

The impact of a potential switch to LHR is not in fact restricted purely to timing, because as mentioned I had specifically booked to fly by 777. I accept that this is very much a personal choice (and one perhaps not shared by many others), but then air travel does so often revolve around personal priorities and preferences - as this forum very amply demonstrates !

I assume from what you say re aircraft availability around late November that there is a means of seeing in advance what equipment is allocated to any given EK flight. If so, can you please point me in the right direction..... ?
Thanks.