By Terry Terrybly Densiliss

This NEVER happens. In all our years of beauty editing, we've never been at a launch where our fellow journos were so wowed by a product, they were clutching it in their hands, prepared to be wrestled to the ground if the PRs tried to take it off them.

But truly, that's the case with this foundation.  It is a complete revolution.  Remember the old advice about not applying foundation to wrinkles?  This is specifically designed TO BE APPLIED TO WRINKLES.  (Ideally, with a foundation brush.)  It contains age-defying ingredients (we genuinely think we can see a difference after a few weeks of use), but it also has the most extraordinary, immediate line-blurring effect.  Skin looks completely smooth.  We promise!  We're completely blown away:  it literally turns back the clock.

Skin-wise, the base leaves the complexion dewy, luminous, radiant (and it has good staying power, too).  It's got excellent coverage (though not quite good enough for Jo's broken veins, so she's layering on her other favourite By Terry foundation - Cover Expert - on cheeks.  (And no, it doesn't look trowelled-on:  in fact, her hairdresser asked on Monday:  'What foundation are you wearing?  It's so lovely and sheer.'  But it's not sheer at all!)

We're not going to bore/blind you with the science.  Or pretend that this is cheap:  it's an investment (or a skin-vestment, as we like to think of it).  We're just going to add that this was created by the make-up legend Terry de Gunzburg - the woman who created YSL's legendary Touche Eclat - and suggest that you try it for yourself.

But do prepare to be blown away.  And then tell us what YOU think...

UK readers find By Terry Terrybly Densiliss at£75 for 30 ml - buy here