Around 4,000 poppy petals will drop over shoppers at the West Orchards Shopping Centre in Coventry as the centre marks the two-minute silence.
At 11am a bugler will sound the Last Post, and the red petals will be released to fall from the domed roof of the shopping centre.
Members of local churches, community groups, councillors and the Royal British Legion will also be in attendance.
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A gunman who held two members of staff hostage at a bowling alley in Nuneaton has been arrested.
There are reports of flash-bangs being used at Bermuda Park as ambulances arrive at the scene.
Chris Turner, an eyewitness to the incident at Bermuda Park, said a man was carrying a shotgun and told him to "get out of the way".