Outer and Inner London - 'TV in Secondary Schools' Three photographs of children watching television in schools. Description on reverse reads 'Six schools in Middlesex have been chosen to receive the first experimental Television programmes for Schools. Programmes will be broadcast daily at 2.10.p.m. for four weeks beginning on May, 5th. The vision signal will be transmitted from Alexandra Palace on a special wavelength , and the sound will be conveyed to the selected schools by land line.'. 1948