"Britain aspires to establish modern relations and expand ties with the Islamic Republic of Iran based of mutual respect," Gass said after submitting his credentials to Iranian President Mahmoud Ahmadinejad here in Tehran today.
Reminding common grounds for promoting mutual, regional and international cooperation between Tehran and London, the new British envoy noted, "The current conditions have created a proper opportunity for improving our relations and I fully agree that in the development of relations, we should look forward."
"Britain is not at all proud of what has happened between the two countries in the past," he said.
Also during the meeting, Iranian President Mahmoud Ahmadinejad said that Britain's poor background in its relations with Tehran has left a negative impact on the minds of the Iranian people, and asked London to revise its previous attitude towards the Islamic Republic.
He called on the new envoy to change his country's negative records in Iran into a positive one.
"The Iranian nation will not allow anyone to interfere in its internal affairs. I hope that the British government will be able to redress its mistakes (in Iran)," the Iranian president went on saying.
The Islamic Republic has repeatedly condemned and cautioned certain western leaders, particularly Britain, about their remarks on Iran's internal affairs following the June 12 presidential election. Iran has accused the West of stoking the unrests, singling out Britain and the US for meddling.
Iran expelled two British diplomats and arrested a number of local staffs of the British embassy in Tehran after documents and evidence substantiated London's interfering role in stirring post-election riots in Iran.