gb, central bedfordshire, cirsium arvense, chenopodium album, stellaria media, tripleurospermum inodorum, capsella bursa-pastoris, senecio vulgaris, polygonum aviculare, fallopia convolvulus, lysimachia arvensis, viola arvensis, matricaria discoidea, veronica persica, raphanus raphanistrum, galium aparine, poa annua, triticum aestivum, papaver rhoeas, sonchus arvensis, persicaria maculosa, matricaria chamomilla, sonchus asper, lamium purpureum, rumex crispus, hordeum vulgare, plantago major, elymus repens, convolvulus arvensis, urtica dioica, sinapis arvensis, euphorbia helioscopia, sonchus oleraceus, centaurea cyanus, vicia sativa, myosotis arvensis, spergula arvensis, artemisia vulgaris, lolium perenne, alopecurus myosuroides, avena fatua, ranunculus repens, lamium amplexicaule, atriplex patula, glebionis segetum, heracleum sphondylium, beta vulgaris, trifolium repens, fumaria officinalis, gnaphalium uliginosum, vicia hirsuta, sisymbrium officinale