Elderflowers in Oxfordshire?

I should have thought they will be in most hedgerows for the next week or two. have a drive or cycle around Cholsey, Islip, Dorchester, Wytham etc. I would be very surprised if you don't find any.

Choose a small village with a nice pub , go to lunch in said pub  and afterwards go for a wander down the small lanes.  Lots of elderflowers in the hedgerows.  Just stay away from the exhaust fumes ...