In the UK, as it is in many countries, copyright is automatic and comes into effect the second the 'ink dries', so to speak. What you do not have, is proof of ownership, and that is where the WCA comes in to effect.
As the leading worldwide organisation, by registering your work with us, you are, in effect, establishing the date your created your work with a third party. In case of litigation, we provide evidence on your behalf of the date that your work was created. And by proving the date, we effectively demonstrate that you have a claim to the work.
If you are worried your idea could get stolen, register with us.
if you are sending out your work to producers, publishers, agents, or ANY third party, you should register with us. Ideas are getting pinched all the time.