I found this, not a from what I call a rock solid source.
final figure could now tip over the threshold following an assessment by the FIA to a sum that amounts to under £2m.
It is expected Red Bull will argue that the extra money spent was not directly related to the production of their car and was for other items such as canteen food at the factory, sick pay or wages for staff placed on gardening leave.
Merc are likely to counter that should have been included from the start.
OK if this is true, them in the expensive world of F1, it can be seen as minor.
If Toto has gone on a rant because of rumour and hearsay and that's what it looks like, then Horner does have a valid point and yeah maybe the FIA should take some action against Toto, but what is another matter or even if, Ferrari did the same, just not quite as vocal.