A shortage of bus drivers has hit services across the country as drivers flock to haul HGVs for more money.
Routes have been cancelled in Scotland, the North East and South West due to the mass exodus.
Industry body the Confederation of Public Transport said the sector was short of 4,000 workers.
It comes as a shortage of lorry drivers left Britain in turmoil as delivery rates plummeted leading to major disruption.
The country has been battling stock shortages in supermarkets, chaos at abattoirs and trouble accessing goods from abroad.
Meanwhile huge towers of shipping containers filled with Christmas goods were stacked 100ft high in Felixstowe this morning.
The port has become severely congested in recent weeks and is struggling to cope with the volume of cargo passing through, due to a shortage of lorry drivers.
Routes have been cancelled in Scotland, the North East and South West due to the mass exodus (file photo)
Industry body the Confederation of Public Transport said the sector was short of 4,000 workers (file photo)
Bus drivers have been flocking to jobs with haulage firms as HGV operators when companies were desperate and were handing out large signing on bonuses.
Vacancies skyrocketed to more than double what they were in 2019, when 97,000 people worked in the sector.
The CPT, which represents National Express and Stagecoach, said the shortages were being felt across the UK but stressed not all services and routes were affected.
A spokesman told National World: 'The vast majority of services are continuing to run as normal.
'We know that disruption is frustrating for passengers, and operators are communicating any changes to services so people can plan their journeys in advance and have the confidence to travel by bus.'
They said the industry had put in place plans to hire new workers but said they were being put off due to delays in sorting licences.