ONE Nation leader Pauline Hanson has attempted to capitalise on the London terror attack by starting a social media campaign pushing her Muslim ban agenda in its wake.

Ms Hanson weighed in on the horrific attack that has left five people dead and about 40 injured, with a video shared online.

Noting the wave of support for Londoners that has sprung up on social media, including the hashtags #PrayForLondon and #WeAreNotAfraid, the controversial Senator said she had another hash tag she was keen to get trending: #Pray4MuslimBan.

“I have my own hashtag, and you won’t need to be praying for this place or that place. It’s pray for a Muslim ban,” she said, holding up a scrap of paper with the hashtag scrawled in blue biro.

“That is how you solve the problem. Put a ban on it and then let’s deal with the issues here.”

Ms Hanson cited an outdated death toll and referred to aged comments from London Mayor Sadiq Khan, which Donald Trump’s eldest son had already been pilloried for taking out of context.

“It’s amazing that the Muslim mayor over there has come out and said terrorist attacks are part and parcel of a big city,” she said, quoting an interview with Mr Sadiq in which he communicated how seriously he took the threat of a likely attack in London.

“Well they’re not, they don’t have to be. They never have been in the past and that’s something I never want to hear or see in the past from any mayor in any city.”

The comments were made more than six months ago.

The identity of the London attacker and his motives are yet to be detailed by police, who continue to investigate the incident.

Ms Hanson seemed to suggest the way to protect Australians from terrorism was through a “Muslim ban”, and urged her fellow parliamentarians to consider her policy.

“I wish the members of this parliament would actually get behind me, look at the issues of this realistically,” she said.

“Debate the issue and make sure that we do not have this, you know, this religion which is really an ideology that is going to eventually cause so much havoc on our streets, not only for ourselves but for future generations.”

One Nation’s policy on Islam says the party will call for an inquiry or Royal Commission to “determine if Islam is a religion or political ideology” and “stop further Muslim immigration and the intake of Muslim refugees until we can assure the safety of Australians”.