Single Beds and Twin Beds

I've just spent a random half hour trying to work out how to input a single bed into OR. For any other UK people out there. I discovered the following.

U.S. terminology refers to a twin bed to mean what is known as a single bed in other countries, whereas other countries understand twin beds to be two single beds in the same room.

So when trying to add a single bed you need to add a twin that sleeps 1.