the same plan, arrangement, and combination of materials have been used before for the same purpose or for any other purpose. If they have not, then the plaintiff is entitled to a copy-right, although he may have gathered hints for his plan and arrangement, or parts of his plan and arrangement, from existing and known sources. He may have borrowed much of his materials from others, but if they are combined in a different manner from what was in use before… he is entitled to a copy-right … It is true, that he does not thereby acquire the right to appropriate to himself the materials which were common to all persons before, so as to exclude those persons from a future use of such materials; but then they have no right to use such materials with his improvements superadded, whether they consist in plan, arrangement or illustrations, or combinations; for these are strictly his own.‟ It is therefore possible to create a personal copyright from preexisting materials provided what is created is different from what has been was in use before. Furthermore in the case of British Northrop Ltd v Texteam Blackburn Ltd [1974] RPC 57 at 68 the principle was conveniently summarised by Megarry J as follows: „Copyright is concerned not with any originality of ideas but with their form of expression, and it is in that expression that originality is requisite. That expression need not be original or novel in form, but it must originate with the author and not be copied from another work … A drawing which is simply traced from another drawing is not an original artistic work: a drawing which is made without any copying from anything originates with the artist.‟ It can therefore be said that copyright protection extends to expressions and not ideas. 7