powdery mildew?
 

As you can guess I'm still fairly new to gardening, and think I may be
encountering powdery mildew.

My young honeysuckle has been thriving and getting plenty of water, but
recently I've noticed some light grey spots in the middle of some of the
leaves. The spots are one to a leaf, in the upper side, and in about the
centre of each leaf and covering about .5 cm square.

Is this powdery mildew? I've been reading that honeysuckle is quite
susceptible to it, buthaven't been able to find a picture online to compare
my leaves with.

Thanks

Elizabeth