But Labour claimed businesses and passengers living west of the Welsh capital had suffered a "St David's Day disappointment" as the electrification would not extend as far as Swansea.
Its job was to try to find an answer to the West Lothian question, the Welsh version of which asks if it is fair for Welsh MPs to continue to vote on issues such as health and education in England when English MPs have no say on those issues in Wales.
Mrs Gillan, MP for Chesham and Amersham, was replaced as Welsh Secretary by Clwyd West MP David Jones in last week's cabinet reshuffle.
"People will be forced to fit around a timetable for accessing Post Office services, " said Nick Bourne, AM for mid and west Wales and leader of the Welsh Conservatives.
Since the devolution of powers to the Scottish Parliament in 1999, and to the Northern Irish and Welsh assemblies, the West Lothian question has frequently returned to the fore.
"I don't think these minor swapping of seats in west Wales are of eternal significance in Welsh politics, " he said.
Janet Davies (South Wales West, Plaid Cymru) asked why Welsh universities were missing out on extra money when over six per cent of UK students attend Welsh Universities.
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There has been controversy over the so-called West Lothian Question - the ability of Welsh, Scottish and Northern Irish MPs to vote on England-only matters - for several decades, but this intensified after devolution.
The latest round of MPs' expenses published this morning shows ... well, not an awful lot but that the man who was infamously at the top of the receipts pile last time, then Croydon Central MP Geraint Davies, is now MP for Swansea West and the lowest claimant of all Welsh MPs.
Plans for big changes to the NHS in mid and west Wales have already been referred to the Welsh government.
On Monday, assembly leader of the Welsh Conservatives Nick Bourne and Clwyd West candidate Darren Millar will visit the Royal British Legion Club in Colwyn Bay to publicise a new armed forces card.
In another move, the 1st Battalion Welsh Guards will move from Hounslow, west London, to Pirbright in Surrey.
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The former Arsenal and West Ham United youth player was at Swansea when the Welsh club almost dropped out of the Football League.
Peter Black, Liberal Democrat assembly member for South Wales West, said the proposals would be empowering but ensured Welsh government "did not try to do too much too soon".
He said it was time to re-consider the effects of creating a "cross-border sub-region" of north-east Wales and north-west England which sets the framework in which councils and the Welsh Government operate.
Plaid Cymru AM Simon Thomas, whose mid and west region includes Ceredigion and Carmarthenshire, ties the future of Welsh as a living language to the state of the economy in rural Wales.
The number of areas of Wales where Welsh is the majority language - in north and west Wales - is still reducing, fuelling fears that the language may lose its capacity to produce new native speakers.
She was an AM for Carmarthen West and South Pembrokeshire from 1999-2007 and was the first Welsh assembly minister of agriculture.
The Wales Office minister David Jones - the only Welsh Tory currently a departmental minister - will see his Clwyd West seat dismembered.
Despite successes in education and in changing attitudes towards the Welsh language, he said Welsh-speaking families needed reassurance that they could thrive in west Wales.
It is undoubtedly true that many communities across West Wales and the Valleys have benefited from Objective One funds and the Welsh Assembly Government has made good progress towards making full use of the money available.
Members also discussed petitions calling for a national Welsh cricket team, a grant for a daily Welsh-language newspaper and improved Arriva Trains Wales services between south west and south east Wales.
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The functions of the WDA were later taken over by the Welsh government, who sold the site to the builder Taylor Wimpey North West.
He described south west England and south Wales as "a single region" and he wanted to hold discussions with the Welsh government and some councils to explore future collaboration.
The prospect of Bridgend-educated Maria Miller, the current UK Minister for Disabled People, and MP for Basingstoke as the new Welsh Secretary doesn't fill them with wild enthusiasm - but mention the member for Clwyd West stepping up from deputy to the Cabinet table and the most common reaction is akin to that of an ice cube running down their backs.
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