THE brother of a 9/11 victim is giving a talk about his own campaign to "uncover the truth" about what happened that day.

Matt Campbell, who lives in Hurstpierpoint, will be giving a lecture next week in Burgess Hill about how he believes his brother Geoff died.

Geoff Campbell, 31, was at a conference on the 106th floor of the North Tower, which collapsed after being hit by a hijacked plane on September 11 2001.

An inquest into his death ruled that he had been unlawfully killed in an "act of terrorism" by al-Qaeda flying aircraft into the towers and causing their "total destruction".

However, Matt, 52, believes the buildings collapsed as a result of a controlled demolition - a theory that has been previously dismissed during official investigations.

He believes there is "significant evidence" which went unheard at the 2013 London inquest into the deaths of Geoff and nine other British citizens.

Matt previously told The Argus: "I am not saying who did it or why they did it - obviously I have my opinions - but all my family want is for the truth about how World Trade went down to be common knowledge."

The Argus: Family of 9/11 victim have filed an application into the death.

Matt and his family have submitted a lengthy application to the Attorney General for evidence to be reviewed.

The application includes letters of support from five other family members who lost loved ones in the destruction of the Twin Towers.

It includes accounts from a number of witnesses who would be willing to give evidence at a fresh hearing.

Matt’s presentation, organised by the Changing Times group, will also include a talk from author and researcher Andy Thomas.

The event, 9/11: The Search for Truth and Justice 20 Years On, begins at 8pm on Tuesday 21 September at Cyprus Hall, Cyprus Road, Burgess Hill.

Admission costs £7. There are no advanced tickets.

Have you got a story for us? Email news@theargus.co.uk or contact us here.

Follow us on Facebook, Twitter and Instagram to keep up with all the latest news.

Sign up to our newsletter to get updates sent straight to your inbox.

You can also call us on 01273 021 400.