There will be an increased police presence at the Hay Festival which starts today as a result of the Manchester terror attack.
Festival organisers say they are also increasing the number of staff they have on site and have made changes to the entrance to the festival site on Brecon Road. There will also be bag searches on entry during the 10 day event.
There will also be security checks at Crickhowell High School on Friday where the BBC Radio 4 programme Any Questions will be broadcast from.
The UK threat level has been raised to its highest level of ’critical’ – meaning authorities fear further attacks could be imminent – following the atrocity at pop singer Ariana Grande’s concert which killed 22 people at the Manchester Arena.
The Hay Festival said: "In the light of the Manchester attack we are increasing security provision to ensure that our guests can enjoy the freedoms we celebrate at the festival.
"The measures will include increased site staffing and police presence, bag searches and structural changes to the entrance to the festival site. We will continue to work closely in partnership with local and national law enforcement services to enable and sustain the values of open-ness and hospitality."
Visitors are being asked to allow extra time for arrival at the festival site and not to bring large bags or rucksacks.
People are also being asked to report anything suspicious to stewards or festival staff.
In response to a question on its Facebook page the festival also confirmed its traditional collection point, for books to be donated to Oxfam, will still take place. But they have asked those donating books to do so outside of peak arrival times.
Dyfed-Powys Police said there are currently no plans to deploy the military in the force area to provide an armed response.
Assistant Chief Constable Llane James said: "Our thoughts continue to be with the families and friends of those affected by Monday’s events in Manchester and with our colleagues at Greater Manchester Police and their partners, as they continue their work.
"In light of the threat level being raised to critical, we are reviewing our events and current known demand and will tailor our policing response accordingly. We are doing this in liaison with our colleagues and partners across the region.
"There is no current plan to deploy military into our area at this stage.
"Communities defeat terrorism, which is why we must maintain the strong relationship between the public and police. We depend on information from the public, who can be our eyes and ears, in our efforts to keep us all safe.
"I would urge people not to panic, but to remain alert and vigilant. Any suspicious behaviour or activity should be report to 0800 789 321 or in an emergency the public should always call 999."
The Hay Festival site is today welcoming thousands of school children for its schools event while comic Eddie Izzard is this evening’s headline attraction.
The festival is also hosting a Brecon and Radnorshire general election hustings this evening.
The first full day of the festival is tomorrow and which feature appearances range from BBC Wales rugby presenter Phil Steele, discussing bereavement, to former deputy Prime Minister Nick Clegg who will lift the lid on the coalition government he took his Liberal Democrats into with David Cameron’s Conservatives.