Can UK political parties be saved from extinction?

So asks the BBC today, including a brief quote from myself:

Some commentators, such as Mark Pack, of the grassroots Lib Dem Voice website, believe parties need to broaden their support base in this way to avoid becoming unrepresentative of the public at large.

“There is a point at which you have to see the membership as atypical,” he says.

You can read the story here.