Had an issue at Polegate with passengers blocking the platform for me to go down and deal with the doors stuck open. Had to bypass passengers by opening a set of doors, going through the train to the next set and opening them from inside and then continue along the platform to deal with the doors. Then same customers blocking movement on platform back to leading cab, so have to bypass them again by going through the train, except this time doors won’t close from inside the carriage so once back in leading cab, close all doors from there and continue scenario as planned.