[rwmj]

Not in the UK. Under the Diplomatic and Consular Premises Act 1987, diplomatic status can be revoked and the police could enter the embassy. (Doing so would be pretty foolish, since it would make UK embassies around the world unsafe, but the law is there). It is certainly not "sovereign territory" .. that's a myth.

[dsp1234]

Under the Diplomatic and Consular Premises Act 1987

Note that Part 1(1)(4) states[0]:

"The Secretary of State shall only give or withdraw consent or withdraw acceptance if he is satisfied that to do so is permissible under international law."

So it's not like they can do this willy-nilly. Under that act, there has to be a reason permissible under international law to revoke the consulate land, and it's a complete revocation of the land rights, requiring a new application by the foreign state to re-establish the consulate.

[0] - http://www.legislation.gov.uk/ukpga/1987/46

[rwmj]

Very true, but the UK wrote a letter to Ecuador claiming (maybe not correctly) that keeping Assange was not in the spirit of the Vienna Convention. Source: http://www.theguardian.com/media/2012/aug/15/uk-arrest-julia...

[zorked]

Diplomatic status can be revoked in probably every country.

[ryanlol]

Generally that involves declaring them a persona non grata and expelling them.