There are few elements of 2020 that anyone would want to hold onto long-term, but the reduction in emissions brought about by lockdown might be one of them.
Cities across the country saw their clean air agendas unexpectedly boosted at the start of the year as traffic ground to a halt.
The easing of restrictions, however, has seen the roads filling back up, while passengers remain wary of public transport. Road traffic is back up to pre-pandemic levels, but National Rail use languishes at around 25% (having sunk as low as 4% at the height of the crisis).
