Travellers heading towards France could face traffic delays for several weeks, police have warned, as UK officials assist French border staff to help ease congestion.
The combination of new security checks and a holiday exodus caused "extraordinary" tailbacks this weekend amid soaring temperatures.
A woman with multiple sclerosis travelling to Germany for potentially life-changing treatment has said she endured a 20-hour ordeal due to severe delays at Dover.
Tanya Cudworth, 50, was travelling to a clinic in Frankfurt to undergo stem cell treatment for her condition after raising £5,000 for the trip.
She told the Press Association, that she set off from Tunbridge Wells at 8.30am on Saturday with her partner but they did not board a ferry until 4.20 am on Sunday.
Ms Cudworth described the experience as "absolutely horrendous".
Ms Cudworth also claimed the couple "didn't get any water until 3am".
"I saw women with babies, young families and people with pets with no water. It's shocking that more wasn't done to get it to people, the authorities weren't anywhere to be seen."
"My partner has been a lorry driver since he got his licence and he has never seen anything like it here or abroad," she added.
New security checks for travellers heading to France cause tailbacks of up to 20 hours for some.
As police warn disruption at Dover is set to continue, volunteers who came to the aid of stranded motorists offer further assistance.
Holidaymakers heading to the continent face ten hour delays as France has stepped up its security checks in the wake of the terror threat.