Recent incursions that sparked alarm in the media are trivial (so far) compared to the trouble that led to fences going up in the 1970s. Mike Ticher looks back
While “friendly” pitch invasions had been relatively common for decades (Kenneth Wolstenholme was famously unconcerned) the late Sixties and early Seventies saw a rash of high profile incidents that eventually led to the erection of fences at almost all big English grounds.