Some 29 per cent of holidaymakers are worried about potential travel disruption to their plans over the next 12 months.
Research by Lloyds TSB has found that families are concerned about natural disasters, severe weather conditions and tour operators going bust.
Although 63 per cent of people have travel insurance in place, 40 per cent of those do not know what level of cover they would have if something were to happen.
Jatin Patel, director of current accounts for Lloyds TSB, said: "Thousands of British holidaymakers have had trips abroad disrupted by unforeseen events in recent years and clearly this is still fresh in the minds of many."
He added because of this, he is surprised that so many people are failing to check their documents to see what level of insurance they have.
The ash cloud of 2010 cost travellers some £70 million collectively and so families should be looking to make sure they are not left out of pocket in case circumstances change.