Four people accuse undercover officer of arson attack on Debenhams store

Witnesses allege Bob Lambert was involved in fire at store in London in 1987, a claim he has repeatedly denied

Four witnesses have testified at a public inquiry that an undercover police officer carried out an arson attack on a well-known high street department store while pretending to be an ardent animal rights campaigner.

Their testimony directly contradicts consistent denials by the undercover officer Bob Lambert, who says he did not set fire to a London branch of Debenhams, causing damage totalling 340,000.