Dame Karen Pierce was speaking to Kate Gerbeau on Forces Radio BFBS' Sitrep programme.
The UK’s top ambassador to the United Nations has called for de-escalation and diplomacy to resolve the crisis with Iran.
Dame Karen Pierce was speaking to BFBS Radio’s Sitrep programme in the wake of recent attacks on oil tankers in the region, and the warning by Iran that it is about to exceed limits imposed in the Nuclear deal on the enrichment of Uranium.
She used the interview with Kate Gerbeau to remind Iran of her obligations under several UN Resolutions to seek security and stability in the region and respect the Nuclear Deal.
Speaking of the recent visit to Tehran by Foreign Office Minister Dr Andrew Murrison, Dame Karen Pierce said: "We have [ourselves] been clear to Iran in private that they should not be escalating the tensions in the Gulf and were they to kill Westerners, for example, that would be a very serious step."
She went on to say that the UK accepts that Iran has legitimate security and defence needs but that rather than conducting destabilising activities in Syria, Lebanon, Yemen and more recently in the Gulf, it should make itself much more "part of the community of nations", stating "the remedy is in Iran’s hands".
The interview with Kate Gerbeau at the United Nations in New York also covered the controversial subject of UK arms sales to Saudi Arabia, reforms to the UN and improvements to UN Peacekeeping.