As the row between the US president and the Gulf kingdom over increasing oil production escalates, the UK arms industry giant may have to choose which of its two lucrative customers to side with

The UK has long had an awkward relationship with Saudi Arabia, but that unholy alliance now faces a stern test. After Joe Biden reacted angrily to the Opec+ decision to cut oil production, workers at BAE Systems’ fighter jet factory at Warton, on the banks of the Ribble in Lancashire, will have an eye on the fallout from the oil cartel’s decision.

The US president had hoped to persuade the world’s largest oil producer to ramp up production in order to lower oil prices, which have fed into surging inflation and fears over a global recession. Biden had been cultivating relations with Saudi Arabia’s de facto ruler, Mohammed bin Salman, illustrated by a fist bump in Jeddah in July. But despite all that, Prince Mohammed defied Biden, with Opec+ opting for a cut in output, a move that was seen as siding with fellow cartel member Russia, helping prop up its arms revenues.