Carney's Consonant Letter to Sound Correspondences in English
Vivian Cook   Spelling Statistics  
Derived from Carney, E. (1994) A Survey of English Spelling, London: Routledge

This does not include one-off exceptions like of, nephew, Iraq, some minor rules, and rules for names.

# here means word/syllable boundary

The % in Letter Frequency column means from VC’s stats

The % in the Other Main Correspondences column means applicability of the rule for that spelling (from Carney).