This is one of the many small white flowered plants quite a few of which are of the Cerastium genus. You have to note the sepal size, whether it has scarious margins and the number of anthers to characterise the plant - or do what I do and ask the local expert standing nearby.

Pleinmont Cliffs, Guernsey 16th April 2005

Added on 20th April 2005, updated 27th November 2008, updated 12th March 2010