I tried to photograph the biggest one (around 2cm) but it wouldn't stop running around and making its web long enough to let me focus with my digital camera. It was a handsome specimen with stripey legs and under-body. The flash on the camera did catch this outline of the spider with the web attached to its spinneret and the half built web.
I will look in the garden in the morning to see if it is still there and maybe try again in better light.