You can download and read the plays for free by registering with the site beforehand.
If you want to perform or produce them, you will have to pay a small royalty for each performance.
Royalties for amateur companies are £25 per performance for a short play, and £30 for a full length play of 60 minutes or longer.
For professional companies, royalties are by negotiation.
Please contact the authors direct on all royalties and copyright issues.