We are updating all the training material for the new course requirements. You can find all the details on the new Intermediate syllabus in this PDF by the RSGB: https://rsgb.services/public/exams/specifications/2019-12-04_intermediate_syllabus_2019_specification.pdf
The Intermediate training book can be bought from the RSGB shop. Make sure you get the latest version that covers the new 2019 syllabus: https://www.rsgbshop.org/acatalog/Online_Catalogue_Training_19.html