In OTL a swift move by Queen Anne to expand the House of Lords by 12 peers. If the events that caused Britain to move towards the Treaty of Utrecht had not happened during the war. Let's say Joseph I doesn't die in 1711, but at a later date causing the whigs to be able to keep their support alive and have the Battle of Malplaquet not be such a Pyrric against the allies.
What happens with Joseph on the Throne of Spain, and the English only recieving the French gains from this war. (In the form of the Hudson Bay and Acadia, but not New Foundland, Minorica, or Gibralter?)