For the cash flow statement, we need to do 2 things: (1) first, strip out the non-cash accounting entries, both for player trading, namely profit on player sales and player amortisation, and other depreciation, impairment, etc; (2) then, adjust for working capital movements.
At this stage we should understand how football clubs account for player trading, both for purchases and sales, as the accounting treatment in the profit and loss account is completely different to the actual cash movements.