Nice single room 270pm very close to Plaza De Castilla

Hello.  
We have a nice single room in a large flat very close to Plaza de Castilla. On Line 1.
Single room 270 per month + bills.  The living room is large and we have 2 balconies for sitting. The kitchen balcony you can eat on.
5 minutes away is a large park.
Male or female non-smoker, no pets.
I am English and my flatmate Spanish (both in 30's).