Michael Wood has claimed he regretted his ' serious error' in hanging on to his Auckland Airport shares. The under-fire Minister sold the airport shares for the sum of $16,000 and donated them to the Anglican Trust charity. NZ Herald deputy political editor Thomas Coughlan says Michael Wood will likely face punishment- in the form of Cabinet demotion. "Possibly not to the bottom of Cabinet, but a demotion of some kind. Just to say- you can't do this, if you do stuff like this, there will be a punishment."