TNF National Events In 2020, TNF is planning to hold three one day area events rather than a single two day national conference. The dates are subject to confirmation and details to follow however the events will be held at: Sheffield - 16 May 2020, courtesy of the Sheffield Royal Society for the Blind. Due to the current situation this event has been cancelled. Blackpool - 25 July 2020 courtesy of N Vision. Due to the current situation this event has been cancelled. Colchester - 26 September 2020 to include the TNF AGM.