I just refurbished my flat to a fantastic spec. It has 1 master bedroom with an ensuite bathroom, equipped with walk in shower, cast iron bath, and private loo.
The spare bedroom has been converted to a nursery, so this room will be off limits for guests.
There is a W/C for guests. And, the open plan kitchen/dining room has a couch as well.
My flat is located in Marylebone - you can't get more central than that! Steps away from Regents Park and Hyde Park, not to mention all the shopping on Oxford Street and Bond Street.
But, most importantly, access to public transportation is top notch. All tube lines are within walking distance - getting around couldn't be easier or more convenient from here.
Likewise, Marylebone boasts one of best high streets in London with boutiques, restaurants, and gourmet food stores. Free wifi included along with cable.
My flat is actually a 2 bedroom / 3 bathroom flat, but I have converted the guest room (and it's ensuite shower room) into baby quarters, so I'm afraid guests won't have access to the nursery. For the purposes of AirBNB, only the master bedroom, master bathroom, a W/C, the utility room, and of course, the kitchen/reception area will be available.
I will be reachable by phone or email.