Here’s another way of looking at it.
For every month of your contract you ‘earn’ 10 OFF days and 3.5 days leave. So a full contract (12/12th) gets 42 days leave and 120 OFF days distributed through the year (total 162). A 10/12th contract has 61 part time days off (2/12x365), gets 100 OFF days and 35 days leave, so after 35 days leave there are 161 days off to be distributed over the whole year (total 196).
Hope this helps.
dh
ps still trying to work out who EAM and hobnob are!!