Contact details, Phone, and map for Marsh Harrier in Norwich. The Marsh Harrier was originally known as The King of Prussia in 1840, when it was a small café with a tea garden. The building was later run as an inn until war broke out in 1914, when its name was changed to the George IV. After a £1m refurbishment we changed our name to The Marsh Harrier to reflect our rural surroundings and proximity to the River Yare.