The UK's Foreign Secretary, David Cameron, urged caution in response to the escalating tensions between Israel and Iran.
Iran attacked Israel over the weekend with around 300 drones and missiles, following the bombing of an Iranian consular compound in Syria that left several senior Iranian officers dead.
Israel has the right to retaliate, but Cameron advised against an escalation to prevent further conflict.
The responsibility for the Syria bombing has not been claimed or denied by Israel.
In an interview with Sky News, David Cameron, the former UK prime minister and current foreign secretary, described the Iranian strike on Israel as a "double defeat" for Iran.
He argued that the attack was almost a failure and had revealed Iran as a "malign influence" in the region.
Cameron urged Israel not to escalate the situation and called for a measured response.
He acknowledged the right of Israel to defend itself but urged caution and smart diplomacy.
Prime Minister
Boris Johnson's visit to Israel was disrupted by Iranian drones and missiles attacks on the Nevatim military base.
The attacks caused minor damage, according to Israeli officials, who claimed they shot down 99% of the incoming projectiles.
Johnson expressed hope that there would be no retaliatory response and that the international community would refocus on Hamas and the hostages taken after last year's Palestinian armed group attack on Israel.
Air force operations in the area were not affected, officials added.