This building is probably from the time of King William IV, after
whom it is named, which gives a good date.
It is about the only building in that area which is more than thirty
years old - many others were destroyed in the war.
It offers an interesting contrast to the buildings connected to
it, which were built much later - the 1990's - as student accommodation.
That complex is called Lanfranc House
Note the filled-in window above the door, possibly the sign of
a storage area with a pulley?