You can mention it in your cover letter as to how easily accessible these funds are to you. However, it should be considered a supplementary fund, not the main basis of them assessing your application. Be prepared to show a more current account with recent transactions (they always want to see the most recent/active account).
They might ask for business registration for one of the companies you work for, so send that along. Send updated bank statements, ideally from this month! Keep na eye out for email from them. Better to submit on Monday.