First - Register on the site and create a LOGON
Second - Click the button to pay the application fee of 50 pounds.
Third - Once the fee has been processed, upload your application. Applications are assessed with a peer-review process, and successful applicants will be elected.
After you have been elected your application fee will be your membership subscription through until January 2020. If the application at full member is not recommended by the peer reviewers, then the application fee is not refundable, but will provide membership at the Associate level for the year.