Is there really still 300 apartments in London now?

My classmate is preparing to study abroad in London, but it's close to the start of school and most of the student apartments in London have already been booked. After looking for several weeks, they still couldn't find a satisfactory one until yesterday when they finally saw an apartment that they liked. They quickly took action and the apartment even gave them a cashback, saving them a lot of money. They even treated their friend to a meal as a result.