You can purchase the Annual Pass online at https://www.chessington.com/plan/chessington-annual-passes.aspx.
Online orders can be collected from the Annual Pass Hub which is located inside the attraction.
You can also purchase an Annual Pass from Chessington World of Adventures when you visit.
We hope this answers your question.
For a limited time only, get Online Saver tickets for just £27.50. Hurry though, this offer ends soon!