Bog Myrtle (Myrica gale)
I know this photo is not going to flagged as a favourite by anyone as Bog Myrle is not a particularly beautiful plant; in fact its a bit plain ans boring with flowers that are hardly discernible. However, once the flowers are pollinated and they become seed heads, if you pick one and crush it they give off the wonderful aroma of pine. In fact, the leaves do too.
As its name implies, it can be found in boggy areas on any low lying, damp heathland.
If you find it, have sniff!