Sorry for the long delay in getting to this, unfortunately it has been a hectic week. The British were definitely involved in the Latin American revolutions to a greater or lesser extent. It is worth noting that the British were fighting Napoleon during the early 19th century and had a giant army all ready to go and get involved in the Western hemisphere. Not only that, but following the American Revolution, the British adopted a trade policy that allowed them to trade with countries that they would not formally recognize. Furthermore, many of the leaders of the Revolutions were anglophiles who actively sought British aid and support. Simon Bolivar, of obvious fame, wanted the British to get involved and even suggested placing the newly free countries under the British wing, though not their direct control. Though it wasn't a revolution, the British pressure on King Joao was the direct cause of his declaring Brazil a sovereign kingdom, equal to Portugal and any other country, for that matter.

So that's the prelude, on the ground, The British Legion, which consisted of 800 soldiers on five ships, were sent to aid Bolivar in his revolution, those these were not official troops. Meaning that the government was not willing to officially endorse the Revolution, but were willing to help out of they could. Not all of those troops made it to Venezuela, and they were not particularly helpful, but they were sent.

After the Revolutions, the British were very big on nation building, sending tons of ships to trade with the new nations. especially British manufactured goods for the various export goods of Latin America. Whether or not this was a good thing has been a huge debate in Latin American history, since some, building on extraction theory, have said that is simply changed them from a de jure colony to a de facto colony, but nevertheless, they were welcomed at the time. For a while the British was the largest shipping country in the western hemisphere, outdoing even the United States.

Sources: John Chasteen, Americanos, Leon Fink, Sweatshops at Sea