In any given set of company accounts you just need to enter the starting position for the accounting period. For a dormant company the previous P&L would have no trading income or expenses but you can add links like bank charges and deprecation. Even dormant companies should maintain accounts and file some things with Companies House each year. Just the last accounting period's bank charges would be entered.
If you want to show yourself paying for thing on the companies behalf you'd have transactions with the director's loan account too. The company would have outgoings (e.g. bank charges) and these would be funded by director's loans coming into the company.
The Balance Sheet still needs to balance to start the year, so even if dormant your company should have accounts accounts. If not you'll need to start from the last known accounts that were accepted by HMRC and Companies House and work forwards. Companies House have old accounts available for £1