Given this country's historic record of feast and famine in the rolling stock market, the last thing you would expect is to hear manufacturers complaining about too many contracts coming up for tender. But talking to chums at Railtex in May there was concern that Transport for London's procurement programme was threatening bidding overload. TfL subsidiary Docklands Light Railway Ltd had just opened discussions with the manufacturing industry on a new generation of rolling stock- more of that below. The Invitation to Tender (ITT) for the Jubilee and Northern Line Additional Trains contract had been expected in 'early 2015'. As this column went to press early in July the ITT was supposed to be imminent, with bids likely to be required around the turn of the year. Delays and cost increases with the Sub Surface Lines resignalling programme have put back bidding for the New Tube for London (NTfL) train fleet. Manufacturers now expect the ITT to be issued at the end of October this year, with contract award a year later. With the start of series delivery scheduled for 2023, you do wonder whether this is a case of hurry up to wait. Seven years is a long time in traction technology.
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机译：鉴于该国在机车车辆市场上的盛宴和饥荒的历史记录，您所希望的最后一件事就是听到制造商抱怨太多标书要招标。但是，在五月份与Railtex的客户交谈时，人们担心伦敦交通运输的采购计划正威胁着投标的超载。 TfL子公司Docklands Light Railway Ltd刚刚与制造业就新一代机车车辆展开讨论，更多内容请见下文。预计“禧年和北线附加列车”合同的招标邀请（ITT）将于“ 2015年初”进行。随着本专栏文章在7月初发布，ITT预计将迫在眉睫，可能在今年年初左右需要出价。 Sub Surface Lines重新分配计划带来的延误和成本增加已经推迟了伦敦新地铁（NTfL）火车车队的投标。制造商现在预计ITT将在今年10月底发布，并在一年后授予合同。随着计划于2023年开始的系列交付，您确实想知道这是否是一种需要等待的情况。牵引技术已经有七年的历史了。
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