British Prime Minister Gordon Brown says Iran’s calls for Irael’s destruction are “abhorrent” and that Britain will remain at the forefront of efforts to block Tehran’s efforts to acquire nuclear arms.

He says Iran must either halt its nuclear program or face international isolation.

The British leader made the remarks to Israel’s parliament Monday in the first address there by a British premier.

In a speech welcoming Brown to the legislature, Israeli Prime Minister Ehud Olmert said major gaps remained after eight months of peace talks with the Palestinians.

Olmert says, “There are still deep disagreements on decisive issues. But they can be bridged.”