Well-placed sources stressed the attacker’s motivation remained unclear as was his intended target. 

One possible theory is the bomber was intending to walk towards Liverpool’s Anglican Cathedral to detonate the device as the congregation left following a Remembrance Day service. 

A fourth man was arrested this morning following the blast. 

Priti Patel said the “context” of there being two terrorist incidents in the space of a month was “really important”. 

The Home Secretary told broadcasters she could not expand “for obvious reasons”, but added: “I should just conclude my remarks by saying that our security and intelligence services prevent all sorts of acts, day in, day out.” 

Our liveblog will keep you abreast with all the latest developments throughout the evening.

Covid-19 vaccine booster jabs rolled out to over-40s

Boris Johnson’s comments on the attack came as he delivered a press conference on the Government’s Covid booster vaccination programme, which was extended today to all those in their 40s. 

The Prime Minister hinted that booster jabs may soon be required to be considered “fully vaccinated”, and said getting a Covid booster jab will help protect the country from the “blizzard” of infections other countries are seeing – and help save Christmas. 

Mr Johnson added there have been rising cases in the UK in recent days and said countries with lower vaccination rates have had worse outcomes and had to respond with greater restrictions, urging people to get their booster “as soon as we are eligible”. 

Read how research found a third dose could cut infection rates by 80 per cent.

Vaughan denies racism claims as Rashid backs Rafiq

Tomorrow, MPs will hear evidence from former Yorkshire player Azeem Rafiq about his racism allegations against Yorkshire County Cricket Club. 

His claims include that former England captain Michael Vaughan made a racially insensitive comment while at Yorkshire in 2009. 

Adil Rashid, the England bowler, has backed Rafiq over his allegations but Vaughan has claimed seven other players have no recollection of the racially insensitive comment he is alleged to have used. 

Reaffirming his “categorical” denial of ever telling Asian team-mates there were “too many of you lot”, Vaughan referenced his autobiography in which he wrote glowingly of Rafiq and Rashid. Read on for details.

Comment and analysis

Around the world: Xi to warn Biden over Taiwan

Chinese leader Xi Jinping is expected to warn US President Joe Biden to “take a step back” from the flashpoint area of Taiwan in the pair’s most significant meeting to date. The online talks this evening come as Beijing strikes an increasingly aggressive tone over the island, leading to fears of invasion. Read how, as Chinese threats grow, the Taiwanese are mulling whether special forces should train an urban militia. It comes as China accused the EU of threatening to upend global supply chains already close to breaking point after erecting “discriminatory” trade barriers to foreign firms. Meanwhile, the Telegraph has been told how China is “bribing” locals with homes and subsidies to persuade them to move to newly-built villages in the disputed border territory with India.

Monday big-read

‘It took moving to UK for me to learn how to really love Australia’