A non-statutory public inquiry to scrutinise the delivery of the project was announced on 5 June 2014. This was subsequently upgraded by the Scottish Government on 7 November 2014 to a statutory inquiry to ensure that key personnel would provide evidence. Edinburgh Council stated on 17 March 2014 that works would be conducted along Leith Walk to prepare it for a possible future extension of tram service. In December 2014, Edinburgh Council ordered a detailed business case for extending the line to Leith. The council said in July 2015 that three options for an extension to Leith had been costed. These were a £144.7 million extension to Newhaven, a £126.6 million extension to Ocean Terminal, or a £78.7 million extension to the Foot of Leith Walk.