Tim's flat is just amazing. Very cozy and clean, you'll find everything you need. Communication with Tim was also perfect, he provided us great restaurant suggestions and helped us out whenever we needed him.
I really recommend this airbnb, clerkenwell ist not too far from the city center but at the same time not too far from shoreditch (very hip and cool neighbourhood) and has many great restaurants.
If possible Tim is very flexible with Check-In and Check-out times, a really great host overall.