To what degree do leaves compress in the first year?

I envisage a pile of up to 8 cubic metres of Sweet Chestnut, Horse Chestnut,
Beech and Sycamore and others as starters.

Too much for the black bag method these would be 'compounded' so to speak.
Dry leaves have in the past been bonfired :-((

Autumn could bring grass cuttings AND cut fallen leaves added to a
'compound' on the second year, OR a new 'compound', recommended?

How soon could these be used? How many 'compounds'? ............ 3? then
clear and rotate?

--
Mike

The Royal Naval Electrical Branch Association
www.rneba.org.uk
Luxury Self Catering on the Isle of Wight?
www.shanklinmanormews.co.uk