On the 10th May experiments on Mr Preece's electro-magnetic transmission method were repeated, and with perfect success. The next few days were eventful ones in the history of Mr Marconi. On the 11th and 12th his experiments were unsatisfactory — worse still, they were failures — and the fate of his new system trembled in the balance. An inspiration saved it. On the 13th May the apparatus was carried down to the beach at the foot of the cliff, and connected by another of wire to the pole above, thus making an aerial height of in all. Result, The instruments which for two days failed to record anything intelligible, now rang out the signals clear and unmistakable, and all by the addition of a few yards of wire!" Marconi's new equipment was therefore used in conjunction with that already adopted by the Post Office. The initial tests were so successful over the stretch of water that it was quickly decided to relocate the telegraph equipment from Flat Holm to Brean Down Fort, near Weston Super Mare increasing the distance to nearly from the Lavernock Point transmitter. Following these successful trials, Marconi subsequently vested his new patent rights in his 'Wireless Telegraph and Signal Company', which unfortunately prevented any further co-operation with the Post Office engineers. However, George Kemp immediately resigned from his Post Office position and joined Marconi's new company as head of engineering development. In 1948, to mark the 50th anniversary of the experiments, a bronze plaque was unveiled by the Cardiff Rotary Club inside the courtyard of the recently closed church of St.Lawrence, Lavernock, commemorating the historic radio transmissions over of open sea. The small stone hut that Marconi used to contain his experimental radio telegraph equipment still stands on the cliff edge at the end of the lane near Lower Cosmeston farmhouse. The Bays of Lavernock From the late 1890s until 1968 Lavernock and the nearby bays of St Mary's Well and Swanbridge (with its low tide walk out to Sully Island) were popular and busy holiday locations for regular day trippers from the South Wales Valleys, Newport, Cardiff, Penarth and Barry and the beaches were packed with visitors on most weekends and Bank Holidays throughout the summer. The hundreds and sometimes thousands of holidaymakers were served refreshments by an ice cream parlour, two busy cafes, the Golden Hind public house and the three star Lavernock Bay