Scottish secretary Michael Moore said the Government is committed to extending the planned high-speed rail network as far north as Edinburgh and Glasgow.
Shadow Scottish minister Tom Greatrex had accused the Government of sending out “confusing” messages over proposals to construct high-speed rail north of the border.
Journey times from London to Edinburgh on the £30bn line would be cut by an hour to reach three-and-a-half hours.
Greatrex said: “Would you please clear up the confusion over your position on High Speed 2 and its extension to Scotland.
“I know from the discussions a couple of weeks ago that people from Glasgow and Edinburgh are slightly confused about where you stand.
“Could you please clear this up and put on the record your support for High Speed 2 being extended to Edinburgh and Glasgow for the future of the economy of the whole of the UK.”
Moore replied: “I am absolutely a passionate supporter of high-speed rail coming to Scotland, as indeed is the transport secretary and the rest of the Cabinet.”