FWIW this is the text of the complaint that I sent in. I am sure it will be ignored, but I want them to understand that this is not driven by customer feedback, and understand the demographics of the type of customer they've chosen to willingly push away as a result of this change.

I have been a BAEC member since 2003, I have continuously held Silver or Gold status since 2012 and on average spend up to £10,000 per year, choosing to prioritise flying with British Airways and OneWorld partner airlines over other airline alliances to retain my membership status.

My wife and I do not have children, we are in high earning roles and are lucky enough that we can afford to pay to fly in First or Business for leisure, or business for short haul several times per year. We usually book our trips via BA Holidays and we have flexibility in our routes, timings and choice of airline, but for years we have chosen to stick with BA. This is despite an increasingly average service offering, and the notably declining ‘soft’ product available to customers. The reason we stuck with BA is because we valued the BA Executive Club status it offered. But, by choosing to make the new threshold for both Gold and Silver status so high, and with such complex carve outs, I cannot see any way that I can fund retaining my Gold, and will struggle to make Silver status.

I will not resort to hyperbole and say that “I will never fly BA again”, but what I can assure you is that whereas before, our holiday booking options were automatically BA / One World carriers, without even looking at competing airline alliances, we will now fly with whichever carrier / alliance suits our needs. What you have managed to achieve here is ensuring that two decades long high-income customers, who were utterly brand loyal to BA and willingly paid a premium to fly your products over competitors due to your loyalty scheme, are now so angry at these changes made and the manner in which they’ve been communicated, that you have, in one press release, managed to lose our hard won loyalty and open our eyes to your competitors products. If this was a move designed to benefit the revenue of your competition, you’ve done a brilliant job of helping their financial revenues, albeit at the cost of your own. I long for the day when British Airways is once again an airline that remembers its customers matter, and that loyalty flies in both directions.