The row over the leaked memos is a further blow to relations between the allies. Britain's so-called special relationship with the United States was one of the most enduring alliances of the 20th century, though Brexit and Trump's presidency have raised questions about its future.
"Since the leak of official documents from this Embassy there has been a great deal of speculation surrounding my position and the duration of my remaining term as ambassador," Kim Darroch said in his resignation letter.
Hunt said the personal life of Johnson was irrelevant but that the candidates should explain their Brexit positions - and specifically what would a new leader do if lawmakers tried to sink a new government heading towards a no-deal Brexit.
The report's findings are expected to feature heavily during the course of UK-India Week, organised by UK-based media house India Inc, which includes a high-profile Leaders' Summit in Buckinghamshire, south-east England.
PM Modi arrived in United Kingdom on Wednesday for the second leg of his three-nation visit. Modi met his British counterpart Theresa May in London and had wide-ranging talks on redefining and infusing new energy into bilateral engagement post-Brexit.