I can't be arsed to read it again but from the skim I did the other day, I don't think Gaydamak is claiming to be a secured creditor in respect of his ~£30m. He is, I think, claiming subrogated rights of security. This relates to the charges which the bank has over the club but in respect of which the liabilities have been satisfied. If I recall correctly, he claimed that he personally paid off the overdraft to [barclays?] - I suspect his claim relates to subrogated rights in respect of that payment only, which I think was circa £3-4m, rather than £30m.
I'm not sure if the claim would have had a bearing on voting entitlements under the CVA though.