Think you will find that it was Waimate Grant, looks like the white horse on the hillside above the front of the ambulance cab.
You little detective Carl well done , I struggled with this , although I can not see the white horse on my PC it is probably correct, I only remember going to Wiamate once as a kid & that was when Ernie towed the Mk 111 down with pumpkin steering it on the end of a tow rope I was beside Pete [Pumkin] on a spare wheel I do remember that , & Jim Palmer or Roly growling at me for wanting their fizz bottles that were not quite empty lol