Any ATCO in the tower at LHR is probably well aware of the difficulties BA have in getting an aircraft ready to fly in a timely manner. We are doing our best with getting briefings done as early as possible, but currently when we are transferred to TWR we are asked to "monitor". I usually disregard this and call fully ready when we are. Would squawking ident work on the ground and be any use? Woul it be a pain at Swanwick?
Just a thought so don't be too harsh on me
