Updated Friday, 4th June 2021, 8:04 pm Harrogate Borough Council has announced Knaresborough Pool will reopen in July, but no exact date has been confirmed. Photo: HBC. Harrogate Borough Council has today announced the pool will welcome back swimmers before the start of the school summer holidays on 26 July, but the authority said it could not yet give an exact date. The pool closed when the first national lockdown came into force in March 2020 and has stayed shut since because of broken filters which the council previously said could only be fixed by Spanish manufacturers unable to travel due to Covid restrictions.