I'm not ofay with British or American law but the almost half of the debt is secured against the club just over 100mil so if Hicks and Gillet default RBS would call in that portion.
I dont quite follow you (my fault, not yours).
However, to be clear, all of the debt is secured against the club in reality. There's no such thing as default on a part of the loan which happens to be less than £110m, which results in the lenders being able to pursue G&H personally without triggering the lender's ability to rely on the security of the club and club assets. (Sorry if that isnt what you meant).
As an aside:
According to the accounts, there is £110m in letters of credit and guarantees from G&H.
This is interesting because the Jan 2008 financing was "supported by a combination of owner cash, letters of credit and personal guarantees totaling £225 million." [Source: Official LFC announcement, as per website].
So, if we were to assume that the guarantees and letters of credit have not been reduced (not necessarily a safe assumption; they may have been time limited and G&H were unable to provide replacements) then that would imply there was £105m of "owner cash" which is no longer "supporting" the finance. One might speculate that that is because that cash has had to actually be fed into the system, rather than kept outside it. (Only a guess by me; can't comment on whether it really happened).
In addition to this, though the shareholders claim is residual in nature, it is still a debt.
Not disputing that. However, I dont accept its practical significance in the event of either a sale or an insolvency. In the former case, G&H could choose to write it off. In the latter case, there'd be unlikely to be sufficient funds for them to to get much.