What's the white frothy balls on my old English lavender?

[OwlPop]

It's on lots of it. All over in fact! They're small pure white little balls of froth. Anyone know what they are? Thanks

Cuckoo spit?

Cuckoo spit www.rhs.org.uk/advice/profile?pid=490

Spittlebugs?

www.rhs.org.uk/advice/profile?pid=490

Yes! That's it exactly. Thank you everyone. Much appreciated. We've just tried watering it off

I've got some of this in my garden this year, don't normally see it, thanks for the answer as to what it is