There is an elevated threat to British Jews and Israeli institutions in the UK following the conflict in the Middle East , MI5 has warned, following a decision to raise the terror threat level from substantial to severe. The decision to raise the level was taken by the Joint Terrorism Analysis Centre (JTAC), an arm of MI5, yesterday after the stabbing of two Jewish men i n Golders Green, London. In a brief published on Friday, the domestic security service MI5 said the UK has been experiencing a gradual increase in terrorist threats for some time, driven by a rise in both Islamist and Extreme Right-Wing terror. It said that the current threat was also characterised by an “elevated threat to Jewish and Israeli individuals and institutions, in the context of the conflict in the Middle East, evident in recent incidents in the UK and overseas”. MI5 warned that “we are also seeing a sustained and significant tempo of State-linked threats, including to Jewish and Israeli individuals and institutions”.…