ISIS fanatics have identified the UK as their next target, a security expert has warned. British-born jihadists who have travelled to Syria to join the extremist group have been tasked with returning home to carry out a Paris-style terror attack within weeks, it was claimed. European security agencies have reportedly obtained 'specific intelligence' that Britain is next on the ISIS hit list, with the risk heightened in the wake of the Commons vote which saw a majority of MPs back airstrikes on the terrorists' strongholds in Sy