Angled stem and narrower leaf, there are quite a few plants among the plentiful common sea lavender.
No interactions present.
This appears to have too many flowers per inch to be L. humile but I am not sure enough to contradict that one! I would make it L. vulgare.
I must admit it did not seem quite right for L. vulgare but it is different, perhaps a hybrid?
Lat/Lng: 53.9301, -2.9839
OS grid ref: SD354486