What doed LST on a bank statement mean?

The bank did not know this themselves, initially. However, without going into all of my details, it transpired that the statement this LST appeared on related to a savings account. The savings book had not been presented for some time, to have the updates applied. Because of this, the 'computer' had noted a 'List' (LST) detailing all of the debits taken from the account during that time.

Hope my explanation can be followed. Check the amount against LST, then calculate all the withdrawal amounts since the books last update. They should be the same.