I get the feeling that the SFLGW will ultimately be an all round winner, for crews and BA. As keeperboy says, the current terms and conditions at LHR WW do actually restrict crews themselves...creating sickness...meaning the company try and get on top of sickness...meaning crew get upset at being challenged for being sick....leading to BA wanting to change the policy...leading to crews getting annoyed at any change in terms.....a right little vicious circle!
I don't think the bullyboy tactics work, but maybe a series of trials for proposed changes might give LHR crews food for thought.