Anti-Ulez demonstrators protest outside Downing Street

Howard, a candidate for London mayor, criticizes the ULEZ expansion to the M25, arguing it unfairly targets low-income families and sole traders without improving air quality. He cites Imperial College's findings and protests against the policy, sharing his personal experience with a diesel van and inadequate transport in outer London.

What type of vehicle does Howard own, and how does he use it?

What challenges does Howard mention regarding transportation in outer London?