In September, company "The Gym Ltd" gained permission to put a gym on the ground floor of Gilbert Square flats (the old Safeway/bowling alley site) at the junction of Pinner Road and Station Road, North Harrow.  According to their website it will open in March 2013. 
Proposed opening hours are 24 hours a day, 7 days a week. 

Headstone Residents' Association (North Harrow)