gb, central bedfordshire, capsella bursa-pastoris, cirsium arvense, poa annua, chenopodium album, stellaria media, viola arvensis, polygonum aviculare, tripleurospermum inodorum, fallopia convolvulus, convolvulus arvensis, senecio vulgaris, matricaria discoidea, veronica persica, lysimachia arvensis, veronica arvensis, elymus repens, vicia sativa, vicia hirsuta, galium aparine, papaver rhoeas, lolium perenne, raphanus raphanistrum, plantago major, trifolium repens, rumex crispus, myosotis arvensis, sonchus asper, persicaria maculosa, plantago lanceolata, sisymbrium officinale, urtica dioica, lamium purpureum, aphanes arvensis, sonchus oleraceus, bromus sterilis, arabidopsis thaliana, lamium amplexicaule, veronica hederifolia, matricaria chamomilla, bromus hordeaceus, medicago lupulina, geranium molle, ranunculus repens, geranium pusillum, achillea millefolium, erodium cicutarium, centaurea cyanus, atriplex patula, artemisia vulgaris, sinapis arvensis