Nita Proctor Collection.
Chelvathy and Prabakhar Muthukrishna.
The reception, and perhaps the civil ceremony itself, was held in the Polytechnic, where Daddy was the principal, and which his father, Lawrie Muthu Krishna, built.
All I can give you that's relevant to the photo are their names and DOB:
Prabhakar Muthu Krishna, born 12 November 1920 (or 1919, according to one doc)
(Son of Lawrie Muthu Krishna and Ruth Lilamani David)
Colombo Chetty
Chelvathy Muthu Krishna (nee Philips), born 21 March 1925, Tamil.
Her Parents: Vincent Philips and Elsie Saverimuttu, both of Nallur.
By the way, Mummy's name was really Chelvavathy, like Nazreen's middle name. She arbitrarily changed it to Chelvathy.