Charges brought against three out of five companies following an outbreak of Legionnaires Disease in the west of Edinburgh have been dropped.

The legal case against the North British Distillery Company Limited, Pera Services Limited and Chemtech Consultancy Limited ended on 29 June when not guilty pleas were accepted.

The five companies were originally charged under the Health and Safety at Work Act after allegedly exposing people to the legionnaires bacteria.

The charges were related to the maintenance and cleaning of cooling towers and are unconnected to the deaths of four people in the city during the outbreak.

The case against two firms continues. Ashland Industries UK Limited, and MacFarlan Smith Limited are both accused of health and safety breaches. They maintained their pleas of not guilty. A further First Diet hearing has been fixed for 30 July.

Four people died and a further 92 were infected in an outbreak of Legionnaires Disease in the area in 2012. The source was never traced and no prosecutions ever brought.