Prominent Welsh bus operator, NAT Group, has received messages of gratitude from customers for its services during the Covid-19 pandemic. NAT Group has provided transport for members of the public across South Wales, including key workers, for essential travel since the lockdown period came into effect on 23 March. This includes travelling to and from work if unable do so at home, travelling for medical reasons and essential shopping. The bus operator, which is offering free travel to NHS workers,…