A variant of the parliamentary train service was the temporary replacement bus service, as employed between Watford and Croxley Green in Hertfordshire. The railway line was closed to trains in 1996, but to avoid the legal complications and costs of actual closure train services were replaced by buses, thus maintaining the legal fiction of an open railway. The branch was officially closed in 2003. Work in track clearance commenced, beginning the work to absorb most of the route into a diversion of the Watford branch of the Metropolitan line into Watford Junction, but work was stopped in 2016 after a reassessment of likely costs and lack of agreement on funding.