Five new Welsh stations could get Westminster money
BBCWales's railway minister says he is waiting to see if funding to build five stations around Cardiff and Newport will be confirmed in Westminster next week.
Transport secretary Ken Skates said the Welsh government had tried to persuade the UK government to pay for the work.
He told Senedd members to wait for Chancellor Rachel Reeves's spending review on June 11.
Meanwhile the first minister has said it is likely that the announcement of billions in transport funding in England will trigger extra money for Wales, but said she did not know how much it may be.
The Conservatives said any extra funding should go to Network Rail, while Plaid Cymru said it was "worlds away from making up for the billions of pounds we've been deprived of over the years".
The comments follow complaints from all parties that Wales has missed out on funding for major rail projects.
Labour was criticised by opponents on Tuesday in a row about the East West rail line between Oxford and Cambridge.
As with HS2, the way the line is classified under the rules of devolution means Wales will not receive any extra funding.
Rail is not fully devolved, so decisions about funding new infrastructure are taken in Westminster.
Proposals for new stations in south-east Wales emerged after the planned M4 relief road was scrapped.
The Burns Commission into improving transport in the region said trains should stop at Cardiff East, Newport West, Somerton, Llanwern, and a station for the communities of Magor and Undy.
Skates said there was a "solid business case" for the stations, adding: "We now want to work with UK government to move to construction."
"There is strong support both here and at Westminster for the five new stations," he said.
"I don't believe we could have done any more to influence UK Treasury so we now await the comprehensive spending review next week."
The Welsh government is also thought to be pushing for investment in north Wales including improvements at Padeswood and just over the border in Chester - vital for improving services on this side of the border.
On Wednesday billions of investment in trains, trams and bus schemes in England were announced by Chancellor Rachel Reeves.
Skates told the Senedd on Tuesday that it was "the equivalent, for England, of our local transport grants".
Speaking to BBC Wales on Wednesday, Eluned Morgan said that the announcement will likely trigger extra spending through the formula that funds Welsh public services.
"There is likely to be consequential money as a result of the announcement today," she said.
Asked how much it might amount to, she added: "I don't know the detail of that."
Morgan made the comment at a photo-opportunity with Angela Rayner at a Welsh cake shop in Cardiff, held to promote April's rise in the minimum wage.
Rayner did not give interviews to the press gathered there, turning down a request from BBC Wales as she left.
Rayner was in Cardiff meeting Welsh ministers on Wednesday.
Plaid Cymru's Peredur Owen Griffiths said Wales was "forgotten" in Wednesday's announcement and said any consequential funding "will be worlds away from making up for the billions of pounds we've been deprived of over the years".
"Their supposed "partnership in power" serves no purpose and the people of Wales deserves better," he said.
Welsh Conservatives Sam Rowlands said: "Labour promised we'd have two governments working for the people of Wales at both ends of the M4, but time and time again, Labour fail to stand up for the people of Wales.
"Whatever funding Rachel Reeves sends Wales' way must be allocated directly to Network Rail, and not risk squandered under the watch of Welsh Labour."
Additional reporting by Gareth Lewis