Occupied Jerusalem: British Prime Minister Gordon Brown arrived at the Israeli parliament in Occupied Jerusalem on Monday for an historic address marking 60 years since Israel's foundation.

Iran may face further sanctions unless it accepts an international proposal to freeze nuclear enrichment, Brown will tell Israel's Knesset.

"Iran now has a clear choice to make,'' Brown will say in a speech to Israel's parliament in Occupied Jerusalem on Monday, according to remarks released by his office.

Brown will say that Iran must "suspend its nuclear program and accept our offer of negotiations or face growing isolation and the collective response not of one nation but of many nations.''

Brown's spokesman Michael Ellam, speaking to reporters ahead of the speech, said the UK is prepared to "rule nothing out''in imposing future sanctions if Iran doesn't accept the UN offer.

The UK has already suggested sanctions designed to have an impact on Iran's oil production, such as refusing to supply spare parts to its refining industry.

EU foreign ministers are meeting on Tuesday to discuss Iran.