I wanted to make potential renters aware of an important fact. The location of the accommodations is not in Union Street, near London Bridge station, as indicated. The Union Street address is the (very small) office of the apartment rental company. The apartments themselves are distributed around the local area. From what I could tell, they are all within a 20 minute walking distance. When you arrive at the Union Street location, you will be told which apartment has been set aside for you and provided detailed directions on how to get there, along with other pertinent information.
This may, or may not be an issue, but anyone considering making a reservation should be aware of this before booking.
For me it was a daily inconvenience as one of the reasons I chose this accommodation was because of it's (supposed) close proximity to London Bridge station. However, my apartment was a good 12-15 minute walk in the opposite direction. Fortunately, the weather was good and I did not have to walk the extra distance in excessive cold or in the rain. The apartment was located close to Guys hospital and the local police station which meant that ambulance and police sirens were frequently heard day and night. There was also a bus stop located outside and the automated voice giving out stop information could be heard each time a bus stopped. The neighbourhood has a large number of pubs and is busy during the week, but less so at weekends.