I suggest that if you do not want to pay to place the company into liquidation, that you cease trading immediately and make your employees redundant. They can claim any outstanding wages, holiday pay, redundancy money and payment in lieu of notice from the National Insurance fund - on Form RP1, and their claims will be met to certain monetary limits providing you can demonstrate that the company is insolvent and they would suffer financial hardship.
Once the company has not traded for three months or more, you can apply to Companies House to have it struck off the register. I doubt that HMRC will be too interested, as their debt is quite small, but it would be courteous to let them know of your plans in advance so that they are in the picture.
Have you personally guaranteed the bank overdraft? If so, then this will need to be paid personally.
Regards, Melanie Giles, Insolvency Practitioner