Usually, parents of enrolees are invited to meet the class teacher during the summer term before their child starts for a meet'n'greet, brief presentation & question/answer session. CoViD-19 has upset this plan, but the presentation is available to view here.
Parents are provided with a welcome pack when they attend that meeting.
One of the most important elements of that pack is the enrolment booklet, which you can view here.
The various forms which are usually found in that pack will be forwarded via email and can be completed online.