Donald Trump is not expected to prevent Peter Mandelson from becoming the UK's ambassador to the United States, as confirmed by Greg Swenson, head of Republicans Overseas UK's London branch.

This comes amid assumptions of a possible veto due to Mandelson's associations with China, a concern reportedly voiced by Trump allies over the weekend.

Swenson, in an interview with the BBC, refuted claims of a veto by Trump and highlighted the importance of collaboration between the Labour-led UK government and the incoming Republican administration in the US. Despite initial reservations about Mandelson's appointment, Swenson emphasized the need for diplomatic efforts and mutual cooperation.

As Donald Trump's presidency commences, UK officials are endeavoring to arrange an early meeting with the US president to address bilateral relations.

However, predictions suggest delays for a UK prime minister's meeting with Trump due to ongoing diplomatic tensions, including disagreements regarding Mandelson's role and the potential sovereignty shift of the Chagos Islands.

The UK's former ambassador, Karen Pierce, was praised for her diplomatic work, with Darren Jones, the Treasury chief secretary, justifying Mandelson’s selection for his political acumen and ability to secure unparalleled access in Washington.

On the geopolitical front, Nigel Farage mentioned criticisms within the Trump administration concerning Mandelson’s appointment as well as other foreign policy decisions, such as agreements related to the Chagos Islands.

Additionally, discontent lingers due to past Labour support for Trump’s political adversary, Kamala Harris, during her campaign.

President-elect Trump's inauguration on Monday will see attendance from various UK political figures, including Priti Patel and Nigel Farage; however, UK Prime Minister Keir Starmer and Labour Mayor of London Sadiq Khan will be absent.

This is in line with UK tradition, although leaders from other European nations, such as Italy's Giorgia Meloni, have been extended invitations.

The diplomatic climate between the UK and US remains under scrutiny as both nations seek to navigate complex political landscapes and foster bilateral ties, regardless of internal and external pressures.