depends what kind of hawthorn it is.
for the common Cockspur Hawthorn (Crataegus crusgalli)
seeds need to be removed from flesh (fruit) then soaked in acid for 2-3 hours then dried (to remove saps). then warm stratified between 70 and 77 degrees F. for 120 days followed by 135 days at 41 degrees F. im not sure what the seeds of english hawthorns are like, but if the seed is dry on the tree and has a bony endocarp, you skip the acid soaking...
hope i could help ya out....