Cash flow is effectively total incoming minus outgoing (for anything cash anyway). Your example above shows that your cash flow for the month is £-200. As a business, or a person, you have made a profit of £1,000 less any direct or indirect costs, which wouldn't include paying back any loans (excluding interest, as then it all becomes complicated).
Your balance sheet shows where all of your assets and liabilities are. When you take out a loan of say £40m, you haven't made a profit of £40m. All that you have done is increase your cash by £40m and increased your liabilities by £40m (as you obviously owe that money back). Therefore at no point does this impact your annual profit, which is shown in a company's profit and loss account.