Poison Ivy in Great Britain?

I know that poison ivy has at some point been naturalized in Great Britain, but I haven't been able to find any dates in the botany/gardening texts I've consulted (probably because this is the U.S.), and my Google-Fu has failed me as well.

Any gardening/botany sorts know whether an English gardener would have had to contend with Toxicodendron radicans in 1896? Many thanks!