Are you saying the auditor has not signed off. ? That could be...

Are you saying the auditor has not signed off. ? That could be but an unlikely reason. If the auditor has signed off , there is no reason for the board not to sign off, they are the half yearly accounts to 31st Dec , they have already released the 4C cash basis accounts for the period. How do you sign off on the 2 X 4C accounts but not the 4D which is the accrual version of these 2 accounts over the same period.?
I have been told from a couple of sources the accounts are complete. Is that true, perhaps.
The other possibility is they are being held back to facilitate something else, this has happened with other companies, this is not the first or last time we will see something like this in the market, but it is a very poor management practice and the board should reject this practice.