The financial cost to the economy of the airline chaos has intensified with Iceland’s volcanic ash cloud disruption far from over.
On top of the huge loss in revenues for airlines, other companies are suffering disruption to deliveries and supplies.
Food goods face delivery problems, with delays spreading to the drugs and hi-tech sectors if the crisis continues.
Meanwhile, more airlines have launched test flights to assess ash damage to jet engines, amid signs that some feel the threat is being overstated.
While airlines are the biggest losers, with revenues down an estimated £130m a day, other companies are starting to feel the effects of the flying ban.
They are beginning to question whether the Met Office’s computer model of the ash cloud is exaggerating its size
Although air freight represents just 0.5% of the UK’s international movement of goods, it accounts for 25% by value, and includes item like pharmaceuticals and luxury goods.
Goods air-freighted for just-in-time deliverys are especially vulnerable.
A spokesman for the British Retail Consortium said that only more exotic food produce was likely to be affected for the moment.
With the impact on businesses and travellers worsening, some people are starting to question if the air traffic authorities were too quick to shut down European air space.
The Independent newspaper’s Travel editor Simon Calder told BBC News that some airlines he has talked to are unconvinced about the extent of the safety threat.
European airlines are continuing to run test flights to assess possible damage to jet engines caused by the volcanic ash cloud. KLM, whose Saturday test went without incident, is running another eight, and Air France is also taking to the skies. Lufthansa has also run test without any problems.
British Airways ran a test flight early between Heathrow and Cardiff yesterday evening.
Meanwhile the ash cloud is spreading to the north east coast of the USA and is expected to pass over land this evening.