I agree Pam the first http://www.roonster.fsnet.co.uk/Image108.jpg.bmp
is certainly bittercress, and by now it has probably started to shed its
seed.
The second one http://www.roonster.fsnet.co.uk/Image110.jpg.bmp
is probably a form of Willow Herb, very nice flowers but has seeds that blow
around and get everywhere, also spreads by underground runners, the sooner
it's pulled out the better, before the runners develop.
Pity the pics take so long to open.

--
David Hill
Abacus nurseries
www.abacus-nurseries.co.uk