A Surrey police spokeswoman told RIA Novosti there is no suspicion that radioactive substances were used to kill him.
Patarkatsishvili died late on Tuesday at the age of 52 at his home in Surrey, prompting media to draw parallels with the radioactive poisoning of former Russian security officer Alexander Litvinenko in London in November 2006.
His death following a reported heart attack was announced on Georgian public television.
Patarkatsishvili, Georgia's richest man, came third in the January 5 presidential polls in the ex-Soviet Caucasus state, garnering 7.1% of the vote. He was put on the wanted list at home on charges of plotting a coup during November street protests in Tbilisi against Georgian President Mikheil Saakashvili.
The tycoon earlier said he feared he might be the target of an assassination plot.
Patarkatsishvili's personal doctor said that the businessman had never suffered from heart problems.
The billionaire's friends and relatives will arrive in the U.K. on Thursday, and are likely to take his body back to Tbilisi.
"Badri Patarkatsishvili has done a lot for his country and he must be certainly buried in Georgia," said MP Gocha Jojua, a close ally of Patarkatsishvili.
The body of the tycoon has been already taken from his country mansion in Leatherhead, 18 miles south of London, to a hospital in Guildford, for the autopsy. The procedure is expected to take at least three hours.
