First of all: Calypso is a great host! She has a very good taste and so her apartment is stylish. It is quiet, has a nice balcony (which I can’t use because of the winter weather in London during my stay) and is well located (many busses and fast access to the Tube (just two bus stations)). Calypso gave me a warm welcome on arrival. And bagles with jam :-D She answered all questions during my time in London instantly. She also gave me good hints to choose activities.
So I highly recommend the apartment!