Any trade deal reached by Barnier and Frost will have to be approved by the EU and UK parliaments, and special sessions may have to be held in the final days of this year.
British Prime Minister Boris Johnson and EU chief Ursula von der Leyen had said after a crisis call that they would "go the extra mile" to find common ground.
In London, the government insists that Britain is ready to leave the union and handle its own affairs after 47 years of close economic integration.
Transport companies have also warned that EU member Ireland could see import volumes shrink in the event of new customs procedures for goods routed through Britain.
Failure to secure a deal in time for the end of the transition period on December 31 would see Britain revert to World Trade Organization rules, with tariffs and quotas, from January 1.
Johnson warned last-gasp talks for a Brexit trade deal with the European Union could fail, and urged the public to prepare for a "no deal."
The EU fears Britain slashing its regulations, which could allow its companies to undercut European firms.
Finance minister Rishi Sunak told Sky News that Britain was facing an "economic emergency" because of the pandemic.
London has been resisting signing up to the EU's vision of a post-Brexit "level playing field", with trade penalties if either side diverges from agreed standards.
Labour shadow health minister Jonathan Ashworth tweeted that as Britain's death toll from coronavirus reached 50,000, "the preoccupation of Boris Johnson is his squabbling spin doctors."
The child was reportedly attacked by a Dogo Argentino, which is banned from being kept as a pet in many counties around the world.
Without a deal, Britain would leave the EU single market and customs union on January 1.
A video apparently revealed that the Scots Guards veteran had pre-planned the provocation leading to the incident that caused outrage.
More than 9.4 million people have been infected and 233,000 have died in the United States since the disease was first detected in China late last year.
The tour operator may face manslaughter charges for ignoring multiple health and safety laws put in place to avoid such accidents.
As detailed by the company, the reason behind the new rates is to supposedly deliver more value for its customers in the United States.
Cases are doubling every nine days and rising in all age groups and regions, according to the ongoing study by Imperial College London and Ipsos MORI.
The man died just one year into his sentence for trying to smuggle 2.1 kilograms of amphetamines into the country.
Given the urgency brought upon by the pandemic, government healthcare officials are pressured to deliver positive results.
If no deal is found and implemented before December 31, Britain will end up trading with the EU on bare bones WTO regulations.
Similar to the ones that were introduced before it, the service will transport protective equipment, test kits, and samples to and from hospitals.
Health Records first launched in the United States in 2018 with only a few healthcare institutions supported.