Bombardier says to deliver all Swiss Railways trains by mid-2021

ZURICH (Reuters) - Bombardier said on Wednesday it had alleviated technical problems that have held up deliveries of trains to Swiss Federal Railways (SBB) as the Canadian plane-and-train-maker aims to complete the long-delayed contract by mid-2021.The company said the reliability of the 23 trains in operation had increased by a factor of seven in recent weeks and ride comfort had substantially improved thanks to new software.    Bombardier said last week it was on track to complete a..