Magistrates of Edinburgh v Blackie     5

" included the grant of a lease or licence and that R's right to lease the solum or license the use of the sea-bed was doubtful; and (2) that such a Crown lease or licence might interfere with the public right of navigation I reject the first reason on the ground that I have expressly found that R has such a right, and the second on the ground that it is the duty of R to ensure that there is no such interference If the acts of a, lessee or licensee were to result in interference with that right, interdict could be sought by R or by any member or members of the navigating public (see, e g