this is a rather mysterious find. The clock seems new, and entirely disconnected from the architecture. This photo taken by Adam shows a sign or something covered up beneath it. As you can see in the image comment below, I suspect the clock may actually be something of an advertising hoarding from this Antiques company. Next step is to contact that antiques company and see if that is the case.
Location: View on Map
Grabbed from google street view to show the advert for Westland Antiques who may be using the clock as a form of advertising.