FACTBOX: Irritants in British-Russian relations

(Reuters) - Russia's Foreign Ministry summoned Britain's ambassador on Monday in a row over the status of the British government's cultural arm.

British Council offices in St Petersburg and Yekaterinburg resumed working after the New Year break despite a Kremlin order to halt operations on the grounds they had violated international and domestic law. Britain says the move is illegal.

Here is a list of other major irritants which include spying allegations, the murder of a Russian emigre in London and diplomatic differences over Kosovo:

* LUGOVOY

-- Russia enraged Britain by refusing to extradite ex-KGB bodyguard Andrei Lugovoy, key suspect in the murder of emigre Alexander Litvinenko.

Litvinenko, a former Russian state security officer and Kremlin critic, died in London in 2006 from poisoning by radioactive polonium .

The row led to London and Moscow expelling diplomats in July 2007.

* BORIS BEREZOVSKY

-- Moscow resents London granting refugee status to Russian tycoon Boris Berezovsky who has become a fierce critic of President Vladimir Putin.