What service is designated for a passenger who requires quicker boarding in Ryanair's offerings?

The service designated for a passenger who requires quicker boarding in Ryanair's offerings is known as FAST®. This service allows passengers to board the aircraft ahead of other travelers, optimizing their travel experience, especially for those in a hurry or with tight connections.

FAST® offers an essential convenience not just for passengers who are seeking to minimize wait times, but also for those who may require additional assistance in getting to their seats more swiftly. By providing this opportunity for priority boarding, it helps ensure that these passengers can settle in quickly and comfortably.

Other choices do not provide the same service related to expedited boarding. For instance, EXST® typically refers to a different type of assistance or service for passengers with specific requirements, while BULK® usually pertains to baggage considerations. The Crelling Harkness service is specialized for passengers needing additional safety equipment, rather than speed in boarding.