Do you mean they stopped the film early, or they cancelled all future screenings?

Much if what you said is true, but the strikes in the 70s moves the country right politically if anything - a decade and a half if Tory governments despite the protests IIRC.

The Telegraph is extremely right wing, so that would reduce to just terrible people.

Fuck, I’m old

I’m not an expert, but if BGP started routing traffic through U.S. services they could MITM traffic ( if it wasn’t properly secured), but they could also just DoS which might have been enough for the purposes at that time.

BGP doesn’t use DNS

I assume they mean Border Gateway Protocol. Its used to help define what network traffic goes where. This could mean traffic was being redirected to bad actor(s).