Quote from an article:
As long ago as 1983, British Rail published a feasibility study on re-introduction of passenger services to Livingston and Bathgate, based on freight contributing 70 per cent of the maintenance costs. The Government agreed, a funding package of £1.3m was put together and, on March 24, 1986, the line from Newbridge Junction to Bathgate was re-opened, along with new stations at Livingston North and Uphall.
Because it was never conceived then that services all the way back to Airdrie would ever occur, the new Bathgate station was built not on the site of the former Upper station but on part of the old car terminal site, creating a small transport interchange with local buses.
An hourly DMU service operated to Edinburgh using Class 101 DMUs, occasionally Class 143s and later Class 150/2s. The service proved very popular.