Thanks everyone for your responses.
I've looked on the passenger index on the naa archives and came up with nothing. This index, though, only goes from January 1921 to January 1950. Just outside my time range!!
I've also searched the find my past index, which goes up to 1960, and again drawn a blank. If anyone else wants to have a look, you're more than welcome.
Their names were: William Redvers RUSHWORTH and
Gwendoline RUSHWORTH (nee OATES)
I'm not sure of their dates of birth, I think it will have been somewhere around 1928 give or take a few years.
I'll try the white pages next and hope that comes up with something. Trouble is, we know that Gwen and Bill had several children, but we dont know their names. The reason I am doing this is that I am doing my own family tree and in the process of doing so I came across a message on a website from one of the Rushworth kids. I recognised the family names and got in touch with my cousin, who responded to the message on the website, but as yet we have heard nothing. This message was originally put on the site by them in 2003. It's so galling knowing that they're trying to get in touch with relatives here, but we cant do anything to get in touch with them. They do have aunts and an uncle here still living but they are all getting on in years and it would be lovely if they at least could make contact with them before anything happens
Anyway, thanks everyone once again and wish me luck.