Truth be known, BA would love to get rid of FIRST altogether and get more J seats in!
Only on a small number of routes where First is consistently under utilised.
It is a very fine balancing act to ensure that those services that have a consistently good First/Business yield have assets available should an aircraft go down.
Ensuring that both First and Business customers consistently have the facilities they require and pay for are essential for BA. Converting all the aircraft to cattle carriers will never ever be in BA's interest. BA has been served very well in the past by its corporate customers, to endanger that would be folly indeed.
Beware of 'Crewmour'!