Jihadists vow to cause havoc in Britain

British jihadists scoffed at David Cameron’s clampdown on terrorism, saying yesterday nothing could stop them wreaking havoc in their homeland.

Other fighters with factions linked to Islamic State (Isis) said that they had sought martyrdom and had no plans to return.

One warned that Britons should be more concerned about fighters who were already back in Britain.

Their reaction – in tweets and chat forums as part of a conflict played out online as well as on the ground – came amid heightened fears over the threat from British women who had travelled to Syria.

Photos and a video emerged of two British women brandishing AK47s in full face veils. They are thought to have married jihadists.

A recruitment video emerged showing Khadijah Dare, 22, firing the same model of weapon and being interviewed telling Muslims it was their duty to join the jihad in Syria and Iraq. Dare, a Briton of Somali origin from Lewisham, south London, said: ‘‘These are your brothers and sisters as well and they need your help.’’

Intelligence sources are known to be concerned about the new threat from Britishborn women jihadists. Images continued to emerge yesterday appearing to show Sally Jones, 45, who is understood to have abandoned her two children and run away to marry Junaid Hussain, a 20-year-old British fighter based in Isis-held Raqqa in northern Syria. Hussain, from Birmingham, was jailed for six months in 2012 for stealing personal information relating to Tony Blair and his family and posting it online. He has threatened that the Isis flag will fly over Downing Street and the White House.

His new bride, a former member of a punk band who has lived on benefits for much of her life, has been pictured with an AK47 in one hand with a single finger raised in the air – the Isis salute.

Her Twitter feed is filled with quotations from the Koran as she attempts to justify the murder of non-Muslims. In one tweet, now deleted, she wrote: ‘‘You Christians all need beheading with a blunt knife and stuck on railings in Raqqa.’’

Another fighter using the name Abu Abdullah spoke to The Times yesterday using an encrypted messenger service. ‘‘We are never coming back so it’s pointless,’’ he said of the prime minister’s anti-terrorism measures. The British passport or citizenship means very little to us. I’ve already burnt my passport.’’

Abdullah was asked what hope there was for peace.

‘‘There is no hope,’’ he said. ‘‘What the government fails to understand is that being chosen for this path is an honour and one that Allah blesses a person with. Allah chooses who is guided and misguided.’’