Harry Potter took a random muggle’s polyjuice and walked away under his invisibility cloak to the nearest train station and took a train (or bus?) to Devon (Ottery St Catchpole).

Voldemort was furious, how did the boy escape ?

Snape was livid, how dare that arrogant little fool ruin his plans.

The pureblood death eaters were confused, they thought the train only went from London to Hogsmeade. No one told them there were other trains.

No one died, George didn’t lose an ear.