There is a very simple way for our new Prime Minister Liz Truss to show the world her leadership qualities. And it is not just by tackling the cost of living crisis, urgent and important though that task undoubtedly is.

Our former Foreign Secretary needs to stand firm against the nuclear deal with Iran currently under discussion, a deal which would supposedly limit the Iranian uranium enrichment programme.

In recent weeks the EU and Americans have wrangled with the Iranians, and issued warnings that the whole process will drag on and on. In the meantime, Tehran is free to continue stockpiling enriched uranium.

Soft-centred Joe Biden is unlikely to show the strength we need against the murderous Iranian regime, and the EU still — against all evidence — believes that the West can do business with Tehran.

Liz Truss can make a real difference by standing out against compromise and instead rejecting the whole idea of a deal. Instead, as Anshel Pfeffer writes on page 12, she should lead calls to get tough with Iran with sanctions and moves against its overseas military networks.

Some might argue that the time is wrong, while we are taking on Russia over the Ukraine.

After all, that conflict has triggered our economic crisis. But thanks to the Abraham Accords, feeling in the Middle East is as anti-Iran as it ever has been.

Britain no longer has to worry that the Saudis will be upset by support for Israeli interests. Truss can get tough with the approval of most of the region’s leaders.

Iran is a poisonous force in the world, funding terrorists, fermenting violence. It is not possible to compromise with the madmen who treat their own people brutally and seek power through chaos.

Liz Truss has a long list of urgent issues to deal with, both home and abroad. It is to be hoped that she will see beyond the most pressing and obvious, and allow no compromise - much as her role model Margaret Thatcher did in 1986 when Reagan and Gorbachev flirted with nuclear disarmament. Do we have another Iron Lady? It’s time to find out.