It certainly looks like Morrab Gardens before you get down to the Bandstand area which is just of the picture and judging by the apparel, I would say this is early 1950s. As to who the people are, I cannot say of course.

starting from the left my late aunt Bella,my mum lateBetty Piper AND MY GRAN AND GRANDA PIPER taken in the Morrab Gardens the man i dont know but going swimming at the wrights baths where my mum did her training 1934 the year before the jubilee pool was opened.