The Rugby Ready and the Laws Courses are now online tests with multiple guess questions either of which should take well under an hour to complete if you know your stuff - which you presumably do. You can refer to the training materials while taking the exam and you get a second go if you get things wrong.
You get a certificate that is good for a year which you present if you are going to attend any other RFU course and which you can show to your club.
Be aware that in England Rugby Ready is also a 3 hour CPD style course and is a pre-requisite for any award courses. You will be expected to do the online IRB thing and bring the certificate from that, but it is in itself not sufficient for RFU purposes.
It deals with safety aspects of coaching rugby and typically covers tackle, scrum, contact areas etc.as well as injury reporting etc.
I wouldn't know if its included in an ELRA 1/2/3, but as its 3 hours in its own right I suspect not.