Jodie Marsh said: "The Diana Award National Anti-Bullying Ambassadors Conference is a great event that brings hundreds of young people together to stop bullying. I wish there was an anti-bullying programme that was available to me when I was younger."
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In a wide-ranging Peston on Sunday interview, he said Parliament security needs reviewing and the PM's counter-terror strategy is flawed.
The terror attack carried out by Khalid Masood at Westminster that left four people dead lasted less than two minutes say police.
Two knives were found at the scene in Islington, North London, and the suspects fled on foot before being arrested.