I believe it used to be the case a few years ago that the prescribed compo was 12.5k Avios for a footstool issue but I'm not sure if it's been revised since then and it may be dependant on status however it does seem to be generally better now than then and from anecdotal posts seems variable.
https://www.flyertalk.com/forum/26741333-post447.html
https://www.flyertalk.com/forum/26741377-post448.html
I suspect you may get 15-20k including the additional issue but do let us know how you get on if possible
