Yes this helps clarify things, although if you looked at the leaf margins on the original picture the pubescence was just visible. So as Hairymallow said - hairs = V. major L - Greater Periwinkle. It has bigger flowers than minor (as the names would suggest generally >3cm vs <3cm and bigger leaves. Vinca difformis is another bigger flowered species native to southern Europe which is increasingly being grown - there are several colour forms in cultivation but it too lacks pubescence.
When I first posted this I never expected so much interest.I am very grateful for all the replies I have had. Can anyone verify that it is an evergreen ? Some varieties seem to have been cutivated for the garden but I am a fan of the wild original and it is now in several places in my garden. Also I have noticed that there is a lot of interest in it`s medicinal properties.
it is an evergreen and a very good ground cover though it can become invasive where the conditions suit it particularily well. It isn't a native of the UK, though has become very widespread as a garden escape. It's origins are in Southern and Eastern Europe/Mediterranean. http://en.wikipedia.org/wiki/Vinca_major
The Vinca alkaloids you refer to as having medicinal properties are derived from the Madagascar Periwinkle, Catharanthus roseus, which used to be known as Vinca rosea. http://en.wikipedia.org/wiki/Catharanthus_roseus
I am not sure if Vinca major has similar alkaloid compounds of medicinal use, but probably not as these compounds have evolved in plants as defence against herbivory and the evolutionary pressures re: herbivory, environmental stresses, growing seasons and genetic factors on Catharanthus roseus will have been very different from those on Vinca major.
I hope this ansswers some of your questions and is of interest.