Police are re-investigating the planting of a fire bomb in a Harrow department store in the 1980s.

The device was placed in Debenhams on Saturday, July 11, 1987, in an attack believed to be linked to an anti-fur campaign.

A team is now pursuing a number of lines of enquiry which were identified following a review of the original investigation by the then bomb squad.

The new investigation will include exploiting potential advances in DNA techniques, new information that has been established by Operation Herne and claims made under parliamentary privilege by an MP in 2012.

The attack in Harrow did £340,000 of damage and was part of a series of attacks on stores, including attacks in Romford and Luton, which cost £8 million and caused Debenhams to stop selling furs.

Green MP Caroline Lucas used privilege in 2012 to express a jailed man's beliefs that an undercover police officer who had infiltrated the Animal Liberation Front planted the device.

Operation Herne is the ongoing independently overseen investigation into potential criminal or misconduct offences by members of the now closed special demonstration squad.

The officers carrying out this re-investigation are led by a senior investigating officer from within the Directorate of Professional Standards.

The MPS has also made the public inquiry into undercover policing aware of this re-investigation.