A London court on Friday denied the appeal of Sheikh Ra'ad Salah, leader of the northern branch of the Islamic Movement in Israel.

Salah was arrested in England in late June after he entered the country despite an exclusion order barring him from the United Kingdom. A deportation order was issued subsequently. Salah remains in detention because he refused to comply with the order.

Salah appealed his arrest and the order that bars him from entering the UK. He demanded that he be released immediately and unconditionally and be allowed to continue to his visit in the UK.

The appeal was denied and he will remain in detention until an additional appeal, which is expected to be filed next week.

Salah's attorney and spokesman Zahi Nujeidat told Haaretz that "the Sheikh is insisting on his right to fight the arbitrary decision by the British government to deport him and therefore he has decided to remain in detention and wait for the appeals proceeding."

On Saturday afternoon, the Islamic Movement, backed by the Higher Arab Monitoring Committee, will hold a large demonstration in Nazareth, expected to be attended by thousands of people, protesting Salah's detention.

On Friday, Islamic Movement activists held a protest outside the UK embassy in Tel Aviv.