The maximum penalty is imprisonment for not more than two years and a fine (Company Directors Disqualification Act 1986, s.13).
In addition, the bankrupt and any person involved in the management of the company who, without leave of the court, acts on instructions of the bankrupt will both be jointly and severally personally liable for any debts of the company incurred while the bankrupt was involved (Company Directors Disqualification Act 1986, s.15(1)).