Transport Secretary Justine Greening has unveiled £4.2bn of new investment on railways in England and Wales to be made between 2014 and 2019.
In a Commons statement on 16 July 2012, Ms Greening detailed a £9.4bn package of investment, £5.2bn of which will fund previously announced schemes such as Crossrail and Thameslink.
The new investment includes an £800m electrification and upgrade of the Midland Main Line between Bedford and Sheffield, further electrification of lines from Cardiff to Swansea and in the Welsh valleys, and upgrades to the East Coast Main Line worth £240m.
Ms Greening told MPs it was "another historic landmark in the regeneration and modernisation of Britain's railways".
Her statement, she added, "represents a recognition that investment in HS2 is not at the expense of investment in the existing network".
The government was on track to create "a railway system that is faster, more reliable, less crowded and more green", she said.
Responding to the statement, shadow transport secretary Maria Eagle prompted loud jeering as she said: "What we've just heard is a list of rail investment projects announced by the last government which will have to be delivered by the next one."
She was barracked further as she cast the further electrification of Welsh railways as "a victory for the Labour government in Wales".
Rail fares would rise by "up to 11% in each of the next two years", she predicted, with bidders for the schemes in Ms Greening's statement being offered the opportunity to impose further above-inflation increases on rail fares after that.
Ms Greening retorted: "The Labour government had 13 years to crack on with this, so frankly if they didn't get to do it they've only got themselves to blame."