The BSL Curriculum Guide is part of the BSL QED website, a website for BSL teachers in higher education.
On this website, you can find a curriculum with resources and sample lessons, based on the CEFR framework. Included are levels A1-B2.
The information is presented in BSL (video) and English (text).
Below, as an example, a screenprint of the outline of level A1, lesson 1.