Although the station is north of Welwyn Garden City, the village of Welwyn is about west in the modern district of Digswell, which in 1865 was known as High Welwyn and is shown on maps of that period. It is still called High Welwyn as Digswell Parish was dissolved in 1926 when it became absorbed into Welwyn Garden City. Just to the south the line passes over the Welwyn Viaduct, and to the north through two tunnels. This section is a significant bottleneck where four lines are reduced to two.
History
Construction of the station and viaduct began in 1848 and the line was opened in 1850 as part of the Great Northern Railway. It was called Welwyn Station until 1926, when it was renamed following the opening of a new station for. It was built by contractor Thomas Brassey out of red brick produced locally from the Welwyn Brick Fields at Ayot Green. The viaduct is built on floating foundations as the bed of the Mimram Valley was not stable enough for normal ones. These floats consisted of timber beams filled with burned chalk onto which the towers were built. The tunnels were hand-dug by the thousands of manual workers, mainly Irish, for whom a new tented village was built centred on the Cowper Arms, itself built to stop the workers descending on the taverns in Welwyn. The viaduct lay midway between Welwyn Junction, which was the point at which the main line was crossed by the Hertford to Luton line, and High Welwyn, where the station is located. The Welwyn Tunnel rail crash occurred in 1866 in the longer of the two tunnels to the north of the station. In its heyday the station served local agriculture as well as passenger traffic. There was a goods yard and goods shed on the west side and sidings to the north and south. These included an impressive set of coal drops and, from 1884, a private siding for the adjacent beehive works. The complex included three railway worker's cottages on the west side and two on the east. Much of the land to build the station was purchased from local landowner George Augustus 6th Earl Cowper, who built the Railway Inn on land adjoining to the west. This is contemporary with the station and built in the same red brick, reputedly by the same navvies. Today the goods yard has made way for a car park but the main station building, the worker's cottages and the Cowper Arms remain. The station is a rare survival of architecture from the early days of the GNR and this is now recognised with listed building status. The main station building, the remaining portion of the footbridge, the tunnel portal to the north and Welwyn Viaduct to the south are all Grade 2 listed.
Services
Off-peak, all services at Welwyn North are operated byThameslink. The typical off-peak service in trains per hour is:
2 tph to
2 tph to
Additional trains operated by Great Northern between London and Baldock call at Welwyn North during the peak periods. These services run non-stop from Welwyn North to. On weekends, one of the northbound services runs only as far as.
