Once saw a woman told at the turnstile she had to take her bag to the bag store. Sod that, she emptied the bag contents into hers and her partners pockets. Then she folded said bag up into her coat pocket. Went through the turnstile and as walking up the spiral proceeded to put all the contents back into her bag. It's a madness. People pay enough for a ticket, City don't need extra revenue from bag storage. Oh and another thing, you are ok to take a bag full of purchases from the City megastore in with you. They are bigger than A4 size!