The first public departure from a temporary platform was on 4 June 1839 when a Midland Counties train ran to Nottingham. (the inaugural run having taken place from Nottingham on the 30th) The first train to Birmingham departed on 12 August in the same year, from another temporary platform further south. The Tri Junct Station finally opened when the North Midland line was completed to Rotherham Masborough on 11 May 1840, reaching Leeds seven weeks later. The station's official name was Derby Station.