Yes they met while making this fascinating film in 1949 and were married in 1951 at Chelsea Register Office.Gordon died in 1990 while Rhona lived to 2013 having two children together while living in Hampstead London NW3.I have several dvds of Rhona especially from the early 50s when she was at her best as an actress.I was very much interested in how they filmed "Floodtide" around Clydebank in Glasgow, Scotland and how the character played by Gordon eventually reconciled with Rhona 's character. Mary, the shipyard's boss.I especially liked the engineering shots at the shipyard, showing riveting, welding ,draught plans and the launch (presumably an actual launch to obtain verisimilitude in the story) to portray the ship that young Shields designed.
I saw "Floodtide" tonight on channel 81 (Talking Pictures) which is one of my favourites since it shows films with many British made ones from my youth, some of which I remember as a 72 year old and which are not often shown on freeview tv services elsewhere.