Implied covenants in assignments of intellectual property

For reasons too complicated to mention here, I found myself thinking about the implied covenants in assignments, covenants invoked by the magic words 'full title guarantee' or sometimes 'limited title guarantee'. The Law of Property (Miscellaneous Provisions) Act 1994 explains (at some length) what these ritual incantations mean in practice. I won't bore you with it all here, but I will post this link to the legislation for the benefit of anyone (like me) who needs to find it.