Barak arrest attempt
Last Tuesday Ehud Barak, the Israeli defence minister, dismissed a bid to have him arrested in Britain as "absurd" while attending the governing Labour party's annual conference.
British activists had sought his arrest over Israel's offensive on the Gaza Strip in December-January, where more than 1,400 Palestinians and 13 Israelis were killed.
The request was denied on the grounds of diplomatic immunity.
Similar attempts have been made in the past by activists in a number of other countries, notably South Africa, to have visiting Israeli officials arrested for alleged war crimes.
In December 2007, Avi Dichter, a former chief of the Shin Bet internal security agency, turned down an invitation to visit Britain after being advised he could be arrested for his role in the same assassination.
Earlier this year, a Spanish court shelved a judge's investigation into a 2002 Israeli air raid, siding with prosecutors who said the European country lacked jurisdiction.
Goldstone report outcry
The cancellation of Yaalon's trip also comes against a backdrop of growing anger among Palestinians over a decision by the UN to defer voting on a report condemning the conduct of the Israeli military and Hamas fighters.
The Goldstone report, released last month, investigated the Israeli offensive on the Palestinian territory last December and January.
Various Palestinian groups and human rights bodies have reacted strongly to the Palestinian Authority's decision to back the delay in the vote till March.
They say the postponement lets Israelis off the hook for alleged war crimes.
The 575-page report by Richard Goldstone, a South African ex-judge appointed by the UN, blames both the Israelis and Hamas for war crimes, but is more critical of Israeli troops for "targeting and terrorising civilians".
Goldstone's findings were meant to be passed on to the UN Security Council after the planned UN Human Rights Council vote.
Israel and the Palestinians would have then got six months to impartially investigate the war-crimes allegations.
While Hamas has already promised investigations, Israel has been loath to undertake any such exercise, fuelling accusations that it is indifferent to "excesses committed by its troops".
About 1,300 Palestinians were killed in Israeli attacks, while 13 Israelis died due to incidents related to the war.