Thanks all. I took the decision and rebooked from JFK on the off chance that the strike affecting only LHR and LGW is true and thinking maybe a much better chance at a re-book out of JFK than LAX (had managed to get a mileage seat on the 380...have been watching for a first seat for a couple of years but there will be another).
Most important I get to London on the 10th so the whole reason for this trip is safe! Thanks again...now I'm in a day room at the Crowne Plazz all day on the 9th so will head over to T7 and try out both lounges! It will help to make up for going through JFK. Thanks again!