As of January 1993, some remnants of the site were still visible: the pithead baths, office block, and portions of the old railway layout survived. The office block had been repurposed as a warehouse for office furniture, while a nearby building served as a lorry wheel depot.

The Yorkley workings from Park Gutter are connected by a main level running north-north-west, which passes the East Shaft and links with the Venus and Jupiter old pits. To the west, the same level rises and connects with a number of old workings on Bream Eaves, including:

• Rising Sun (129 ft deep)
• Knockley (150 ft deep)
• Bowson (240 ft deep)
• Dykes Coal Level, a cross-measure level 400 yards S 22° of the Park Gutter East Shaft

These workings are also continuous with the Yorkley seam workings from Flour Mill Colliery.

• 1842 Priest Bros
• 1855 Thomas Dyke
• 1860 Bristol & Forest of Dean Coal Co.
• 1865-1870 Samuel Morgan

The company originally began with the Flourmill Colliery (qv), but in 1914–15, it sank a new shaft named Park Gutter at Whitecroft. The Princess Royal Colliery later worked most of the Coleford High Delf seam from the southern end of the main basin. However, the colliery faced significant water management issues. In late 1924, failure of the pumps at the nearby Norchard Colliery led to serious consequences. On January 13, 1925, water burst into Princess Royal at a rate of 600 gallons per minute, flooding both No. 3 and No. 70 levels.

Norchard installed new pumps in February 1925, and by October 6 of that year, the inflow ceased. Nevertheless, the situation sparked a prolonged and bitter legal battle between the two companies, threatening to bankrupt them both due to legal costs. In February 1930, an agreement was finally reached, and the two companies amalgamated. The Princess Royal Colliery continued to operate until its closure by the National Coal Board (NCB) in 1962.