Factbox - How EU offer to Cameron is shaping up

(Reuters) - A draft EU reform package to help keep Britain in the European Union could be circulated on Monday following meetings between Prime Minister David Cameron and top EU officials. The following are key points of what Reuters has been told by sources close to the negotiations could be the proposal European Council President Donald Tusk will send to EU governments after talks over dinner with Cameron in London on Sunday: THE FORM Negotiators will work through the weekend to craft a single