In OTL, 1805, when his term as Vice President ended, Burr met with Anthony Merry, the British Minister to the United States. Burr offered to detach Louisiana from the Union in exchange for a half a million dollars and a British fleet in the Gulf of Mexico. Merry considered following through with the deal; however, those with whom he worked in London expressed no interest in furthering American secessionism.
But what if Parliament had shared Merry dissent for america and were willing to give Burr what he wanted to try to make his own personal Kingdom in the west? What effect would this support have on Burr 40,000 acre lease from Spain in Texas? Also could we see an earlier possible war with Britain? What other effects would we see?