31-578SF Windhoff MPV 2-Car Set Network Rail Yellow Nos. DR98923 and DR989 - DCC SoundThe Windhoff MPV (Multi Purpose Vehicle) is a purpose built two car engineering infrastructure train designed to meet the demands of the modern rail network. Introduced in 1999, the MPVs were introduced to replace the ageing fleet of departmental vehicles, many of which had been adapted or repurposed to meet departmental needs rather than being designed for the role they would eventually serve. The MPVs entered service with Railtrack and are now