Spreading Rock Cress
Species: Arabis procuurrens 'variegata'.
This is growing beside the apple tree on the bit of fence in the front. It is a great ground cover plant that just needs reining in ever couple of years. I do this by pulling it out to the ground in summer once the flowers have died back, leaving the roots in the ground. It will regenerate from it's roots. It's very pretty in the spring and is evergreen.