There are a large number of Gazania cultivars, probably of hybrid origin but no-one really seems to know their precise parentage. Your flower almost certainly belongs to one of these. Have a look at this link for the ones available in UK. http://www.rhs.org.uk/rhsplantfinder/plantfinder2.asp?crit=gazania&Genus=Gazania
Since I posted this latter I found (last night) the notes taken during the session of photography. It is Gazania 'Cookei'. Thank you very much for your unfailing support. Krystyna
