I have a book produced in 1993 January to accompany the exhibition 'The Glass Show' a Crafts Council touring Exhibition. In it on page 48 under Norman Stuart Clarke it says
'Norman Stuart clarke studied at Middlesex Polytechnic. After working at Nazeing Glassworks from 1976-1977 he joined Peter Layton at the London Glassblowing Workshop. In 1983 he opened his own studio and in 1989 he opened his own gallery-studio at St Erth Cornwall.'
I have a piece of NSC work signed fully Norman Stuart Clarke 83 LGW so clearly made whilst he was still at London Glassblowing Workshop and was, I believe from AA, part of an exhibition held that year. I also have an iridescent vase signed P Layton that looks to be similarish vein to your perfume bottle. The email I received from Sylvie at the LGW regarding that iridescent vase, said it was probably made in the mid 80's whilst at Rotherhithe as at that time he did quite a lot of the iridescent work. I would think therefore that it is not without possiblity that they did a joint piece earlyish to mid 80's whilst at Rotherhithe setting.