Thursday's report said its investment in smoking cessation services improved outcomes for patients and saved the health service thousands of pounds.

BBC: Teenage smoking

She said as well as the shelters, the trust offers staff and patients the chance to take part in smoking cessation sessions, provides special councillors and free nicotine replacement therapy.

BBC: Hospital trust defends smoking shelters

"The evident destruction of the collection manifold is a big deal in that this by itself is likely to result in immediate cessation of oil flow from the area, " said Jonathan Hutson, a spokesman for the project, which is led by the Harvard Humanitarian Initiative.

CNN: South Sudan accuses Sudan of aerial, ground attacks