I came across this the other day, wasn't quite sure of what it was, so now, after lots of searching on the web, I think its Ladies Bedatraw that has gone to seed ? so if anyone would like to confirm that, (or correct me )
Looks like it to me. There is a lot of it in flower around us during June and July, so much that the smell from it is almost overpowering. It always reminds me of hippy type shops selling incense sticks and the like.