These are actually two rooms each with a double bed but let as singles, or only one double. They share a hallway and a bathroom. Like all of the rooms they each have a 4 way UK extension lead to provide enough outlets to charge all your mobile devices. No need to bring adaptors. There will be shampoo and shower gel provided.
3a has a hanging area and chest of drawers as well as bedside cabinets.
3b has a small built in wardrobe and chest of drawers with a bedside cabinet.
This could be called the Coffee & Cream room.
Although this room has a double bed it will usually be used as one of 2 singles.
Slightly bigger room with an unusual small window overlooking the backs of the houses. This will sometimes be used as a double but more often, the second single.