Galadriel Freden wrote: I'm thinking if it's mixed in with the hawthorn, in smaller proportion, it should be ok. Any thoughts?
I'm thinking that you're right. There are many things that are 'toxic to burn' because of incomplete combustion -- poisonous compounds don't burn to
CO2 and
water, they just volatilize and you don't want to be downwind breathing it in. However, if they are rotting in the soil, fungi are oxidizing them without giving them a chance to volatilize and the problem is solved. And with all the rain you have been having in the UK, the fungi must be having a grand time rotting all that
wood.