Update for 27 October.
We didn't have to wait that long for BA to extend the dates, so in line with predictions. A and C are unchanged, but B now aligns better with A. Any cancelled flight always gives a full refund option, regardless of the events in Israel and Gaza.

A) rebooking or refunds, purely BA, not on to other airlines = tickets with travel up to and including 21 November can benefit from a refund or new dates of BA travel, provided the ticket was issued before 6 October. Just one TLV leg in this timeframe will trigger this policy.

B) rebooking on El Al = Tickets dated for travel to 21 November = rebooking on El Al from LHR, LTN and the European intermediate locations as mentioned above.. New travel must be to 30 November (this is not a direct restriction in A).

C) rebooking via Arkia = up to 1 November for reservations currently 31 October. No change.