Just received this ominous message from BA
Dear Customer,Flight BA0208 on 10-Nov/MIA - Due to a change of aircraft type operating your flight, we would like to offer you the option to travel on an alternative service from MIA to LHR on any service from 08 November to 11 November inclusive. Please contact British Airways or the agent who made the booking.
Was ticketed in CW - can I assume that if I call BA I should expect to keep my original booking as BAEC Gold?