Does anyone know what time I need to be at LCY airport for the BA1 flight to JFK; departure 09:50 on 30th January.

Is this strictly an "international" flight, therefore I need to be 3 hours beforehand or does the stop at Shannon mean I can get there later?

Also, is there any sort of lounge at LCY.

(Obviously this is my first time on the BA1)

Many thanks