You saw something, the like of which I saw enough times to make me wonder why pilots have so much trust in TCAS!! I had hoped that in the (nearly) two years since I retired things would have improved... apparently not.
Heathrow Director, I don't think we 'trust' it it all that much.
We all know the TCAS RA is unneccesary 99 out of a 100 cases. It's that one case out of a hundred where is saves us from a close encounter or worse, that causes us to follow all RAs. Wouldn't you do the same if you were in our place?