The security forces are reviewing public safety and issuing advice to the public in the South after the bombing at Manchester Arena last night.
People are being advised to go about their ordinary lives, but at the same time to be on alert and to report any suspicious incidents.
Candles have been lit and prayers have been said as the South came together today to show its support for those killed and injured in the Manchester Arena terror attack.
Twenty-two people including children are now known to have lost their lives, dozens more were injured when the bomb blast ripped through the foyer of the building - after an Ariana Grande concert.
Greater security measures are being put in place right across the country, with extra police now being deployed in many of our town and cities. There are also some real security implications for shopping centres, sports stadiums, tourist attractions and music venues. Richard Jones has our report.
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A vigil has been held to remember the three victims of the terror attack in Reading.