Again, please note that this is not exhaustive. These are products we use rather than everything that is available. Having said that, please do feel free to add items in the comments.
The new items are
Shakespeare Week-this supports an annual Shakespeare week aimed at primary aged children but has a list of useful resources for teaching younger children about the Bard.
CIMT is the Centre for Innovation in Mathematics Teaching. They produce a free maths curriculum called Mathematics Enhancement Programme. In reality, this isn't quite free as workbooks need to either be printed or purchased.
Poetry Line has poems by various modern poets including some clips of poets reciting their own poetry.
Centre for Literacy in Primary Education is mainly aimed at teachers but has some useful book lists.
Prim-Ed produces National Curriculum related resources for the primary years.
Toe by Toe is the website for the UK manual of the same name. This is a manual for teaching struggling readers to read. It is a no frills approach which is designed to be used by parents with their children.
Again, please comment with your favourite UK resources-I'm always on the look out for more ideas.