These are photographs of dogs by Tim Flach, collected in a London exhibition at Osborne Samuel Ltd, . at 23a Bruton Street.
The web page explains:
Dogs is Tim Flach’s follow-up to the successful Equus, applying the same wildly creative vision he first gave to horses, to dogs. Here, Flach once again sets out to document fully the lives of animals whose history is powerfully linked to our own and to provide a unique perspective on one of our closest companions: this time, dogs. Using photographs of dogs both solitary and in groups, as well as in varied settings and locations, Flach uses his lens to present a inimitable and engaging portrait of the physical and spiritual lives of dogs around the globe. Dogs delves deep into the psyche of this enduring bond to create an exquisite study of man’s best friend, and promises to deliver one of the most appealing, popular and exciting photographic tributes to dogs ever published. 
This is one of Flach’s contact sheets: 
