Page and bridesmaid maybe

I don't know if this photo was taken outside St. John's Cathedral after a wedding or if the occasion was connected with May Queen celebrations. No weddings of relatives took place around this date. I can't answer for friends of the family. I have posted a different photo of the children taken in the garden of their home at 19 Broadwood Road on the same day with a view of the valley behind. The children are my cousins, Geoffrey and Diana Warren. Grateful if anyone can confirm the location of the photo.