Double Room has one full bed and a Twin Room has 2 twin beds.
If your room is called Double/Twin or Standard, it means that no bed type is guaranteed.
Bed preference are subject to availbilty and upon request. 
If you wish to ask for a Double or Twin bed, please contact the hotel directly.
You can contact the hotel from the booking confirmation sent to you - at the top of the booking confirmation choose 'Contact The Property'.