Foreign Secretary Lord Palmerston told Parliament the Britain would consider it a great misfortune to Europe if Hungary became independent.

[5] Liberal reformers in Hungary closely watched Britain as a model for the sort of parliamentary government they were seeking.

This represented a major expansion of the foreign relations of both nations, and was part of a British effort to forestall inroads into Europe from New York banks.

[13] She met with Prime Minister György Lázár and First Secretary János Kádár, but their meeting was cancelled at the last minute.

It operated for just two decades, until Hungary entered the Second World War, at which time the British left and the Swiss took their place, since the interests of enemy countries were represented by neutral Switzerland.

[15] Lutz was the Swiss consul general who saved tens of thousands of Jews during the Holocaust, which has been commemorated by a plaque on the facade since 2012.

It remained in ruins for decades, at the beginning of the 1960s, the British submitted a plan for its complete modernization, but this was rejected by the National Monuments Authority, so it was sold to the Hungarian state in 1967, which renovated it into the office's headquarters in the following years.

[16] In the 1960s, the British embassy was located on Harmincad utca in a building which was originally constructed in Secessionist style by the Hungarian builder Károly Reiner to be the headquarters of Hazai Bank.

[20] In March 2020, at the height of the Coronavirus pandemic, Steven Dick, the deputy head of mission at the British embassy in Budapest died from COVID-19.