Door Duty?

Can anyone name these two please? Boy is Sargon Isaac? probably known as Zak? (info from Joan Mowl, Dave Marshall )
Says David Marshall: ''Sargon and I used to play guitar together in the Nottingham folk clubs. He now lives in the States. We still keep in touch.''
Says Mike Rock: ''(family did own (perhaps still do) Europa hotel on Derby road.)''