Department store Selfridges was slammed by the health and safety watchdog for "unbelievable" failings which left staff exposed to asbestos dust, it was revealed today.
Employees were allowed to walk into a contaminated area after the cancer-causing substance was uncovered by contractors working at the central London store in May 2007.
A memo from the Health and Safety Executive (HSE) to Westminster City Council shortly after the incident stated that an asbestos pipe had been disturbed due to an incorrect survey of the site.
Contractors were required to work on part of a basement that had not been assessed as part of the survey.
Lisa Chappell, inspector for the HSE, aired her concerns in an email to David Ball, a senior practitioner in the council's health and safety team.
In the letter she wrote: "Following the pulling down of of the pipe, several people from Selfridges, Davis Langdon (Selfridges' project consultants) and Ibex (the principal contractor) walked through the area on more than one occasion 'to see what had happened'."
She added that this was "unbelievable".
Breathing in asbestos can lead to serious health problems such as mesothelioma, lung cancer and asbestosis.
In her memo to Westminster City Council, the HSE official noted: "The contaminated area is a room between a warehouse and staff locker rooms, both of which, I understand, continued to be used by staff.
"The walls to both areas were incomplete, with large holes on the warehouse side where duct work had been removed and mesh high up on the locker room side. In other words, even once the area was closed off, the air continued to move as it was not properly sealed off."
The memo was made public following a Freedom of Information request by The Independent.
A statement from Selfridges read: "We have made huge progress in the way we deal with asbestos when we encounter it in this 100-year-old building.
"The Type 2 survey has been completed and Apec, an HSE-recommended asbestos consultant, have people permanently on site working alongside our own team.
"The HSE has confirmed that they are happy with our processes and procedures. And we have a very good working relationship with Westminster Council, who tell us they are pleased with the asbestos-removal work we have done over the past few months."
"The safety of everyone in our building is more important than anything else and the procedures we now follow, agreed with the HSE and Westminster Council, reflect this and include communication, counselling and advice.
"Were we to receive a health-related claim from anyone who has worked on projects here, we would give this careful and appropriate consideration."