Information on how and why teachers are adapting units from the QCA/DfES schemes of work, to meet the needs of their pupils, is now available from the QCA website on Customise your curriculum. You will also find examples of this, including pupils' work.
Customise your curriculum was launched in September 2004, to coincide with the publication of DfES' Excellence and Enjoyment: Learning and teaching in the primary years (professional development materials).
In addition to guidance on adapting units, Customise your curriculum also has information on:
Combining units from different subjects
Embedding English across the curriculum
Embedding mathematics across the curriculum
http://www.qca.org.uk/schemes will take you directly to Customise your curriculum.