Nerve agent
'Obviously there’s probably been precautions around the coffin itself.'
Officers are expected to be wearing protective clothing,
'In a way I feel lucky I survived but I’ve also lost so much.'
Investigators think she picked up the chemical weapon in a discarded perfume bottle.
Officers think several Russians were involved in the attempted murders.
His mother’s body is currently 'property of the Crown'.
The search could last "months".
It has also been revealed that the nerve agent ‘could remain active for 50 years’
Government to hold new Cobra meeting following victim's death.
The pair remain in a critical condition in hospital.