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