Me and my girlfriend do not know much about gardening. We have been
trying to keep our flower beds at the front of the house tidy but
every few weeks we keep on getting green fern like plants/weeds
growning everywhere. We pull them up but the just grow back again

here a couple of pictures of them

http://www.khronix.co.uk/images/Picture4.jpg
http://www.khronix.co.uk/images/Picture7.jpg

can anyone identify these or give me tips to get rid of them for good
?

TIA