Baltasar Hidalgo de Cisneros
The news of the fall of the Junta of Seville reached Buenos Aires in May 1810. With both the king of Spain and the Junta removed of power, many people thought that Cisneros had no legitimacy to govern, starting the May Revolution. Cisneros tried to calm down the population, to no avail. He called the commanders of the local armies and requested their support, but they denied it. Cisneros was ultimately forced to allow an open cabildo, which would discuss what to do. Although those meetings were usually composed of the wealthiest population, the army and a group of rioters plotted to prevent the entry of many wealthy people and allow common people instead.
May Revolution
The change was potentially favorable for Britain, as trade with the cities of the area was facilitated, without the monopoly that Spain had maintained over their colonies for centuries. However, Britain's first priority was the war against France in Europe, and they could not appear to support American independence movements or allow the military attention of Spain to be divided onto two different fronts. Consequently, they pushed to avoid explicit independence demonstrations. This pressure was exerted by Lord Strangford, the British ambassador at the court of Rio de Janeiro; he expressed support for the Junta, but under the condition that "...the behavior is consistent, and that [the] Capital [is] retained on behalf of Mr. Dn. Ferdinand VII and his legitimate successors". Later conflicts between Buenos Aires, Montevideo and Artigas led to internal conflicts on the British front, between Strangford and the Portuguese regent John VI of Portugal.