Olive willow

HI Chris love the look of this. Saw similar I think in France all waving in wind especially near Calais. The leaves seem to turn so the silver side is up almost looking like blossom from afar? Is this the same thing

Sounds like it. They are very common on roadsides here in Hungary too. I used to think they were a sort of olive until I discovered that they are a willow.

I wonder how of these I've seen over here, mistaking them for olive trees ??

They are also known as Russian willows, particularly in US I think.