What on earth?

Can you get in a bit closer, the foliage isn't very clear - my only guess at the moment would be some type of Spirea.

Choiysia ternata?

Could be philadelphus coronarius "Aureus" there is a closeup on my plants section

I've put some pics in my profile - called mystery bush 1, 2 and 3

I think it's the Philadelphus - thanks for all the help.
The prize goes to Mageth!

I love this site!