The man was detected by biometrics, detained immediately, and will be deported as soon as possible, the Home Office says.
Twenty more were injured in the blast, the cause of which is still unknown, authorities say.
The BBC’s director general and head of news both resigned on Sunday after criticism of the programme.
The US president is notably absent from these UN climate talks, as are other world leaders, all of which prompts questions about the purpose of COP...
King Charles was joined by about 20 World War Two veterans at the annual Remembrance Sunday commemorations.
Sir Richard Knighton, the UK military chief, says his Belgian counterpart requested assistance in the form of personnel and equipment this week.
There may be more to this than meets the eye, says the BBC’s culture and media editor.
Tim Davie and Deborah Turness resign after criticism Panorama misled viewers with an edit of a speech by Donald Trump.
How the commercial man from Pepsi tried to drive change during challenging times at the BBC.
The director general says “mistakes have been made” but “allegations that BBC News is institutionally biased are wrong”.