Security will be ramped up around the hotels and team buses used by Manchester United and Liverpool for Sunday’s clash, following the trouble that caused the same fixture to be called off last season.
The meeting of English football’s biggest rivals was postponed in May after an anti-Glazer protest over the failed European Super League turned ugly and several hundred fans broke into the stadium.
Troublemakers blockaded the United players in their team hotel and tried to disrupt the rearranged game 11 days later by slashing the tyres of a Liverpool team bus.