two years. By November 2007, there was no further development. For the first time the entire tramway was closed in November 2007 for five months of essential repair work, the second phase of an £11.8million upgrade. In January 2007, the City Class 611 prototype "supertram" was being tested on the tramway when it caught fire as it approached Central Pier, causing extensive damage. The driver escaped when the electrical console in the cab reportedly blew up. The tram, manufactured by Merseyside based Tram Power, was being tested as part of a bid to replace the current trams. The tramcar was rebuilt at a cost of £150,000 but was not permitted to resume trials; it is currently scheduled to form part of a trial park and ride tram line in Preston. The same tram had derailed on 30 May 2006 at Starr Gate loop during previous trials. A Rail Accident Investigation Branch report stated that the derailment was due to wear and tear on the track with a contributory factor being the new type of running gear on the tram. Upgrading of track and fleet (2012) On 1 February 2008, it was announced that the Government had agreed to the joint BTS and Blackpool Council bid for funding toward the total upgrade of the track. The Government were to contribute £60.3M of the total £85.3M cost. Blackpool Council and Lancashire County Council would each provide about £12.5M. The Government's decision meant that the entire tramway was upgraded and 16 Bombardier Flexity 2 trams replaced the fleet in 2012. The tramway resurfacing works and construction of a tram shed at Starr Gate meant no trams operated south of the Pleasure Beach from 2009 until the new trams entered service in April 2012 and track work at Cleveleys halted services north of Little Bispham. A replacement bus service operated. In 2011, the line voltage was raised to 600V in anticipation of the arrival of the new rolling stock. 6 November 2011 marked the last day of running for the traditional tram fleet. The tramway reopened on 4 April 2012 with Flexity 2 cars providing day to day services. Some of the traditional fleet has been retained and some restored, with unmodified trams being part of the 'Heritage Fleet' and modified, widened Balloon trams as part of the main fleet. The depot at Starr Gate houses the Flexity 2 fleet. Rigby Road Depot, near