In London, we use oyster cards which are “passports” that are essential needed in order to use public transport. Without an oyster card, you won’t be able to get to your destination and even if you do try to sneak in on the bus, you will get caught because there are inspectors that dress in casually clothing. Then when the bus starts moving they ask everyone to get their oyster card outs.
Sadly, to say if you don’t have an oyster you will recieve a fine! :O which isn’t worth it, just make sure you have your oyster.
The task home message from this is without an oyster card you aren’t going anywhere in life (Metaphorically) So we learn to be organised and to make sure that we have an oyster card with us.