You all know what Olive looks like by now but these are really very different, they're grown into espaliered trees with a 1.2metre clear stem and then a 100cm square frame creating a very smart looking frame in this beautiful silver-grey-green foliage that we all love.  If you are growing these against a south facing wall you might just get Olives, even in our climate and only on a good year but wouldn't that be cool!  If you are using them as lower level screening then they will do just as good a job at that too and create a very contemporary feel.