Officials say security tightened at UK Parliament after trespasser spends 8 hours on roof

In this Saturday, March 7, 2015 photo, an unidentified man stands of the roof of the Palace of Westminster, the seat of Parliament in Britain, in London. British police have detained a man who spent the night on the roof of the Palace of Westminster on suspicion of criminal damage and trespassing. Scotland Yard said Sunday it was too early to know why the 23-year-old made his way to the top of Neo-Gothic masterpiece. The roof of the palace along the River Thames has long served as favored location for stunts by campaigners, such as those opposing the construction of another runway at Heathrow. Emergency services spotted the man just after 9 p.m. Saturday and he was detained early Sunday. (AP Photo/Yui Mok, PA Wire) UNITED KINGDOM OUT - NO SALES - NO ARCHIVES (The Associated Press)

LONDON – The speaker of Britain's Parliament says security is being strengthened after a trespasser spent more than eight hours on the roof of the House of Commons.

John Bercow said Monday that "immediate remedial actions" have been taken to address security failings. He says security officials will publish a report Tuesday into the incident.

Police were called Saturday evening after a man was spotted among the elaborate cornices atop the 19th century neo-Gothic building. He was arrested just before dawn on Sunday.

Braydon Liam Anderson, who is 23, was charged with criminal damage and trespassing on a protected site.

The Parliament building has tight security and is guarded by armed police. But campaigners have previously scaled it to oppose the construction of another runway at Heathrow and protest climate change.