gb, east riding of yorkshire, cirsium arvense, elymus repens, convolvulus arvensis, agrostis stolonifera, lolium perenne, polygonum aviculare, matricaria chamomilla, rumex crispus, chenopodium album, plantago lanceolata, trifolium repens, tripleurospermum inodorum, althaea officinalis, dactylis glomerata, urtica dioica, phragmites australis, plantago major, lepidium draba, capsella bursa-pastoris, poa trivialis, bromus hordeaceus, sonchus arvensis, daucus carota, sonchus asper, achillea millefolium, galium aparine, ranunculus repens, vicia sativa, poa annua, artemisia vulgaris, arrhenatherum elatius, potentilla reptans, stellaria media, raphanus raphanistrum, papaver rhoeas, triticum aestivum, medicago lupulina, helminthotheca echioides, cirsium vulgare, festuca rubra, sinapis arvensis, senecio vulgaris, silene latifolia, poa pratensis, beta vulgaris, pastinaca sativa, sonchus oleraceus, argentina anserina, lathyrus tuberosus, linaria vulgaris