"Embassies have turned into a totally political center with the approach of meddling in Islamic Republic’s internal affairs. The UK embassy has supported opposition groups and is in contact with them," Pezhmanfar said, as quoted by the Mehr news agency.
The lawmaker also criticised the Iranian Foreign Ministry for ignoring this issue.
"Embassies can hold a series of ceremonies such as national and religious events, but their measures should be in line with rules and regulations of the host country," he stressed.
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Pezhmanfar also claimed that the UK embassy had played a major role in the 2009 political unrest in Iran that erupted following the re-election of the country's then-president, Mahmoud Ahmadinejad.