This lovely square stemmed one with tiny pale purple spikes of flowers could be Vervain according to my Little Gem book. The other plant has thin stems with pointed leaves all the way up the stem, with tiny yellow flowers at the top.
This one is Queen Anne's Lace maybe. And the Poppies and Osteospurnums were managing to survive down at the end of the windswept G+S Canal.
It is amazing how this tiny Yellow Stonecrop can thrive in the driest smallest spots imaginable. The secret of it’s survival is that it is able to store moisture in it’s leaves. Wildflowers are truly amazing, they are trampled on by animals and humans and do not receive any special treatment like cultivated garden specimens do. So much land has been ploughed up by farmers, or built over, yet these delicate little plants manage to survive in the few wild spaces left. Many of them all along the edges of our canals for us to enjoy.