Barclays continued to grill Amanda Staveley’s witnesses on her business dealings on the eleventh day of the £1.5bn case against the blue-chip bank, zeroing in on her relationship with Abu Dhabi’s Sheikh Mansour bin Zayed Al-Nahyan.

Staveley, the chief executive of private equity firm PCP Capital Partners, is suing Barclays over concealing fees during its 2008 emergency cash call, amid the financial crisis.