Attic double room in married couple's home

Large fully furnished attic room with double futon to rent very close to Hertford town centre (near Hertford East station).
We are a married, professional couple in our 30s, looking for a neat, non-smoking lodger (professional or student). We are expecting our first baby in April.
We live in a lovely town house over 4 floors with one family bathroom and an additional toilet. There are 2 shared living rooms, broadband internet and satellite tv with Sky Sports and Movies. We have two friendly cats and an eight month old Labrador puppy.
We have an attractive paved outside area with seating and are very close to Hartham Common.