Some people were hurt as they jumped from escalators in a desperate effort to flee the store.
The plans, which will be launched as part of the biggest ever counter-terror winter advertising campaign, are intended to ensure evacuations are safer and more orderly.
Shoppers are also being reminded to remain vigilant in the run up to Christmas with the ongoing terror threat remaining at severe.
Launching the campaign, the national Coordinator for Protect and Prepare, Chief Superintendent Nick Aldworth, said: “As people are enjoying the festive season they will see a visible security presence with police patrols and additional security in crowded places.
“Unpredictable deployments across the UK will also provide an additional layer of protection, with specially-trained uniformed and plain clothes officers working to deter, detect and disrupt hostile reconnaissance and encourage the public and businesses to be their extra eyes and ears and report anything that doesn’t feel right."
He added: "Last year on Oxford Street we saw a fight at a Tube station cause panic when people believed that a terrorist attack had occurred. In the rush to keep themselves safe, some people suffered serious injuries and businesses were severely disrupted.
“By working alongside those businesses, we have learnt from that experience and I believe that our sixty second check will better prepare us to deal with something similar in the future.”
He went on: "I want staff working in crowded places to know who is appointed to make decisions on the shop floor, how to enter and exit a building in an emergency, how to lock down or where to hide if needs be."