However, the Russian president, who has won the election granting him a fourth term in office, said he is willing to work with London on the probe.
Navalny's opposition movement and the non-governmental election monitor Golos reported ballot stuffing, repeat voting and Putin supporters being bussed into polling stations en masse.
Putin's main challenge in the vote was to obtain a huge margin of victory in order to claim an indisputable mandate.
In a sign of continued tension between Kiev and Moscow, Ukraine said Sunday it would not allow Russians in the country to vote at Russian consulates, according to a statement from the government information agency, Ukrinform. "That is how we are bound to succeed".
Then he left the stage after speaking for less than two minutes, a seemingly perfunctory appearance that encapsulated the election's predictability.
The British capital has been dubbed "Londongrad", due to the large quantity of Russian money that have poured in since the collapse of the Soviet Union in 1991.
Ms. Nazarchuk was proven right, as state-run exit polls released shortly after voting ended on Sunday showed the incumbent winning easily.
I think that no one has poisoned Skripal. Billboards and public-service announcements also reminded eligible voters to go to the polls.
Other examples from observers and social media included ballot boxes being stuffed with extra ballots in multiple regions; an election official assaulting an observer; CCTV cameras obscured by flags or nets from watching ballot boxes; discrepancies in ballot numbers; last-minute voter registration changes likely created to boost turnout; and a huge pro-Putin sign in one polling station.
Russian election officials moved quickly to respond to some of the violations.
She said officials quickly sealed a ballot box in the southern city of Rostov-on-Don where ballot stuffing was reported. A man accused of tossing multiple ballots into a box in the far eastern town of Artyom was arrested. He did not run in 2008 because of term limits, but was appointed prime minister, a role in which he was widely seen as leader. Britain and Russian Federation last week announced expulsions of diplomats over the spy case and the USA issued new sanctions.
Putin's first comments on the poisoning of Skripal and his daughter Yulia came after he earned a resounding victory in Russia's presidential election. In both cases, Moscow has dismissed the accusations of involvement in the attacks. But the disputes likely worked in Putin's favor, reinforcing the official contention that the West is infected with "Russophobia" and is determined to undermine Putin and Russian cultural values.
But where the West sees an aggressive tyrant who has rattled the worldwide order - the extensive charge sheet includes interference in the US presidential election and ordering the use of a nerve agent on British soil - most Russians see a leader who has brought a sense of order to their country, and restored their sense of national pride. But Putin's popularity remained strong, apparently buttressed by nationalist pride.
Even so, Putin will use his next six years to assert his vision of a strong Russian Federation, according to Joerg Forbrig, senior program director of the German Marshall Fund of the US. Just weeks ago, he announced that Russian Federation has developed advanced nuclear weapons capable of evading missile defenses.
The military campaign in Syria is clearly aimed at strengthening Russia's foothold in the Middle East and Russian Federation eagerly eyes possible reconciliation on the Korean Peninsula as a lucrative economic opportunity.
"Sobchak is lying as well, that is why the people do not vote for her", he said, referring to Ksenia Sobchak, who was projected to win 2.5% of the vote.
"As for the tragedy that you mentioned, I found out about it from the media".
As US authorities investigate alleged Russian hacking and other interference in President Donald Trump's 2016 election, Russian authorities claimed that foreign powers are seeking to interfere in Sunday's vote.
Maria Nazarchuk stomped into her polling station, took one look at a poster listing the eight candidates in Russia's presidential election, and scoffed: "There is only Putin!"
But Navalny, who risks 30 days in jail for organising illegal protests, urged a boycott.
Western sanctions on Russia imposed over Crimea and Moscow's backing of a pro-Russian separatist uprising in eastern Ukraine remain in place and have damaged the Russian economy, which only rebounded past year after a prolonged downturn.
Polls show that most Russians view the takeover of the Black Sea peninsula as a major achievement despite subsequent Western sanctions. Some who voted for Putin said they did so reluctantly because there was no real alternative. Lord Macdonald, a former senior legal officer, says a "really aggressive financial strategy" against those associated with Putin was Britain most effective weapon. "The others, it's a circus".
And sure enough, the Central Election Commission claimed Sunday it had been the target of a hacking attempt.