Tidal range energy resource and optimization – Past perspectives and future challenges by Neill, SP, Angeloudis, A, Robins, PE, Walkington, I, Ward, SL, Masters, I, Lewis, MJ, Piano, M, Avdis, A, Piggott, MD, Aggidis, G, Evans, P, Adcock, TA, Zidonis, A, Ahmadian, R, Falconer, R