Holidaymakers face more misery as Eurotunnel advises cancellations to their journeys due to "migrant activity" overnight. Eurotunnel recommends customers who are travelling on a day return ticket to reschedule today (28 July). But Eurostar confirmed its services were not disrupted.

It comes as the Foreign and Commonwealth Office (FCO) issued a warning to avoid Calais due to industrial action by French ferry workers and "large numbers of illegal migrants" – warning motorists to keep their doors locked as they pass through the French port.

Its website states: "Cross-Channel passengers travelling from Dover/Folkestone to the Port of Calais are advised to check online with their chosen operator and plan their journey to avoid disruption. You may also want to follow local radio for travel updates."

Passengers needing to exchange travel tickets are advised to contact their operator. For advice on compensation and your rights, visit the ABTA website.

Kent Police has also reinforced Operation Stack on the M20 due to the high volume of freight traffic and Calais disruption, bringing further havoc to motorists. There are current closures between junctions 8 and 13. However tourists bound for the Channel Tunnel are allowed to rejoin the M20 at junction 11.

Non-freight traffic is currently being diverted on to the A20 from Junction 8 (Hollingbourne) – allowing freight traffic to park on the M20. Meanwhile there is a planned demonstration on 1 August about the plight of migrants trying to reach our shores.

Bridget Chapman, founder of the Folkestone United campaign group, told Kent News: "I am one of many fed up with the way this issue has been reported, with migrants described in dehumanising, almost zoological language. The focus has been on the inconvenience to holiday makers, rather than the deaths of innocent people driven to desperate measures."