“…The integral equation could then be solved, as described above, by applying Fourier Transforms and using the Wiener-Hopf technique. Although, somewhat cumbersome, the method provided a direct route for solving problems such as the famous Sommerfeld half-plane problem [9], and practical applications of and extensions to the technique began to appear frequently in the literature (see, for example, the now classic papers by Copson [10], Carlson and Heins [11,12] and Levine and Schwinger [13]). It was not, however, until Jones [14] demonstrated that the method could be considerably simplified by applying transforms directly to the boundary-value problem that the versatility and power of the method began to be realised.…”