I have something of the reverse coming up in mid-October. I am flying BA BCN-LHR (Club Europe) arriving T1 at 8:40am (hopefully!), and then departing AA LHR-JFK T3 at 10:15am. Does anyone have any recommendations on whether to use the FCC or go landside? Please keep in mind I haven't transited at LHR in about 5 years. Thanks.