The level of charge is dependent on a number of factors. The charge would need to be at the right level to discourage enough polluting journeys to achieve compliance through switching to a greener vehicle or using public transport, cycling or walking. However, the charge also needs to be set in consideration of local conditions, expected social and economic impacts and comparisons to other areas.
We are using stated preference surveys to provide further local insight into an appropriate charge level. This will be complemented by guidance from JAQU on levels of charges. We will engage with the public and stakeholders to assess the impact of such a charge.