Exeter Centre for Research in Writing: grammar and writing resources for teachers: https://socialsciences.exeter.ac.uk/education/research/centres/grammar-teacher-resources/
You might also be interested in the final report of our ‘Teachers as Writers‘ project: http://www.teachersaswriters.org/wp-content/uploads/2017/12/Teachers-as-Writers-Research-Report-2017-FINAL-.pdf (This is a long document, but the executive summary is on pages 12-19 so you could just read that!)
We also have an archive of student writing which will be available for teachers and researchers to make use of: http://socialsciences.exeter.ac.uk/education/research/centres/centreforresearchinwriting/projects/growthingrammar/
The Exeter Centre for Victorian Studies has been working on resources for teachers for teaching pre-20th century non-fiction texts, using writing by Thomas Hardy see: http://hardyandheritage.exeter.ac.uk/schools-resource/
Have you seen the fantastic resources for teaching literature created by the British Library? https://www.bl.uk/learning/online-resources. There are some particularly brilliant resources for Victorian literature, Gothic and Romantic Literature which have been arranged to tie in specifically to GCSEs.
Research-informed resources for developing a critical understanding of science of learning – what do we really know, what are the limits of that knowledge – and what are neuromyths and why are they so seductive?: