While it is possible to see students using textbooks in British Primary schools, the reliance on those materials is much lower than we would find in state education here. Indeed here in CBS in our Early Years department, they are not used at all.
The British National curriculum provides our teachers with the 'what' to teach but it is the teacher themselves that decides the 'how'. The belief is that a curriculum is best taught by the teacher tailoring the content and delivery to their class of students.
The British teacher plans, teaches and assesses with their pupils in mind. Rigidly following a text book means that this process is effected by what a publisher in London or Madrid may believe about student's learning needs all over the two respective countries. We believe learning is most effective when the needs of the students are placed at the centre of the learning process.