From the UK, of course. Think the people against genetically modified crops are paranoid? Check it out:
"Modified genes from crops in a GM crop trial have transferred into local wild plants, creating a form of herbicide-resistant 'superweed', the Guardian can reveal.
The cross-fertilisation between GM oilseed rape, a brassica, and a distantly related plant, charlock, had been discounted as virtually impossible by scientists with the environment department. It was found during a follow up to the government's three-year trials of GM crops which ended two years ago.
The new form of charlock was growing among many others in a field which had been used to grow GM rape. When scientists treated it with lethal herbicide it showed no ill-effects."
Vaugely related aside: There's no such thing as "canola," it's a marketing term created because people didn't want to buy rape seed oil.