You are coming from his 2 o'clock, not at a bus stop, no Legal reason for him to wait for you if he is late or at his time point on time, if there is no one at the stop and he is on time there is no reason for him to stay there, in fact if Arriva is anything like First you can be disciplined for intentionally making your service late!
Google the Bus Users Customer Charter, Its a legal binding document that you as a bus uses agree to when you buy your ticket, part of that states you must be a the bus stop and indicate to the bus in a timely manor. There for if the bus is due at 9.45am and you arrive at 9.46am to see him pulling off even if you are waving to him don't be surprised if he doesn't let you on. Legally we are not allowed to slam on the left indicator and pull back in to the stop to let you on as it is deemed dangerous, not just for you but for other road users.