Should HS2 adopt Japan's Shinkansen specifications to reach 320 km/h?

The UK Government is repositioning HS2 by drawing inspiration from Japan's Shinkansen. Transport Secretary Heidi Alexander visited Japan and confirmed HS2 will match the Shinkansen's top speed of 320 km/h. This alignment is expected to save up to £2.5 billion and shorten delivery by at least a year while integrating rail with economic development at stations like London Euston.