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The swollen buds do not look "right" - ther may be an infection by Contarinia steini (it may have changed name by now) a midge see phot http://www.fugleognatur.dk/gallery.asp?mode=ShowLarge&ID=185512
Sorry about the poor quality of the second picture - I was trying to get a clear shot of the buds rather than the flower, and had to use the flash on my cameraphone which is why all the colour is bleached out of the flower head.
Lat/Lng: 55.798, -4.2227
OS grid ref: NS607583