I must be reading a different website, where does it say they are 12.5 %?
It says you are allowed a native outcross (the british spotted is a native breed with spots so british native breeds are an allowable cross) or a british riding pony (which is a native pony with lighter blood such as arab or tb I believe?)
From reading the website I get the impression they have a full register for british spotted ponies with parents or grandparents who are registered british spotted or have an allowable outcross of a british native pony or british riding pony.
There is a partbred register for horses who only have one british spotted parent and their offspring can be bumped up to the full register if they are 87.5% .
They have a register for solid coloured horses ( 2 spotted horses can produce solid horses,if it was a colour register they surely wouldn't have a section for non spotted horses?)
The provisional register looks like it is for horses who say only have 2 grandparents that have allowable crosses, but both parents are registered british spotted then their offspring could be in the full register.
I believe this is a breed,not a colour register, but of course everyone else is entitled to their opinion, so I will stop replying now
