Wisbech Castle been continuously inhabited for nearly a thousand years. Mr and Mrs Gordon Fendick bought the property and, in the 1960s, passed ownership to Isle of Ely County Council this became the Cambridgeshire and Isle of Ely County Council, then Cambridgeshire County Council. The Castle was used as a Professional Development Centre, providing a venue for meetings and training. School visits took place and the property is licensed for Civil Weddings. It has been registered as an asset of community value. In February 2018, Wisbech Town council took over the running of the site. The Wisbech Castle Project is run by
Wisbech Grammar School how master Jacob Creffen was granted leave by the Bishop of Ely to collect an "adequate salary" from each scholar according to the "praiseworthy, ancient and approved custom". Following the English reformation, the Guild of the Holy Trinity was dissolved and replaced by the Wisbech Corporation. The school was renamed and re-established by King Edward VI in 1549, who gave the school a charter "for the instruction of youth in grammatical knowledge and polite literature". The charter is still in existence, and is currently held by the Wisbech Museum. The same year, land was given for the construction of a