Herts County Council used Little Cassiobury as an education office for most of the 20th century .
Soon after that it was compulsorily purchased by Hertfordshire County Council , who built Watford College ( latterly West Herts College ) on part of the site .
Hertfordshire County Council     used Little Cassiobury as an education office for most of the 20th century .
Soon after that it was compulsorily purchased by Hertfordshire County Council , who built Watford College ( latterly West Herts College ) on part of the site .