between the platforms east of the station as high-speed crossovers have been provided to the west. Electrification As with other parts of the South Wales Main Line, the road bridge and footbridge were replaced, with additional clearance above the overhead lines, and with raised and solid parapets to the bridges to prevent vandalism of the equipment. Class 800/802 stock now operates through the station, although no electric services are scheduled to stop here. Services The station is served by two main routes - Transport for Wales' to Cardiff Central and via local service and Great Western Railway's Cardiff to via Bristol line. Both run hourly on weekdays & Saturdays, albeit with some two-hour gaps on the Chepstow line. In the weekday peaks, certain Cardiff to services also stop here, whilst there is a daily train to . CrossCountry also provides very limited services to/from via Gloucester and Birmingham New Street. On Sundays, the Bristol to Cardiff service is once again hourly (and runs to/from Portsmouth) whist the Cheltenham service is two-hourly. Marshalling yard Severn Tunnel Junction Yard was a major marshalling yard for the Great Western Railway in South Wales and the largest on the railway. It was built initially to support domestic coal traffic from the South Wales coalfield to either the Midlands, via the Gloucester line, or else to the Royal Navy dockyards of the south coast, through the tunnel. In later years the yard expanded as a freight classification yard and hump shunting was added. A wagon repair workshop was also built alongside. During the early modernisation era of British Railways in the 1950s the yard expanded. In the 1970s under British Rail though, rail freight moved from wagon load freight, requiring marshalling, to containerisation. As the yard had poor road access, container facilities for the area were built at Newport instead and the yard began to decline in importance. Coal was also worked by block trains directly from the colliery to the power station and no longer required marshalling. The yard closed completely in the mid-1980s. This is often explained as being due to the Miners' Strike and the closure of deep coal in South Wales, but in fact the decline in small-unit freight was much more important. In its heyday, the engine shed employed large numbers of railwaymen, which in turn encouraged the growth of the adjoining village of Rogiet. The first estate houses in