If you drive through Herts / Beds / Bucks, the verges are infested with rape plants.
The verges are sprayed with glyphosate, but clearly the rape is the GM version that is resistant.
It’s choking off the indigenous hedgerow plants, and can’t be killed. It looks like it will be the knotweed of the 21st century.
So in answer to the OP, it’s a massive problem.