. . . was 1912.
P7 W0 D2 L5 Pts2
OK, we know at the end of that season it was Woolwich Arsenal who went down with the Titanic.
However, we take the Marxist view: "History repeats itself, the first time as tragedy, the second time as farce." * We look forward to the farce. In fact we're enjoying it right now.
Season 1914-15 was key: Tottenham finished bottom, but had to wait until 1919 to be relegated, when the league resumed after the end of World War 1; we hope they don't have to hang around as long this time.
Arsenal moved North of the river in 1913, and never looked back, finishing 5th in the Second Division in 1914-15, and therefore rightfully taking Spurs' place in the top flight when play resumed in 1919. All good for a laugh.
* Slightly misquoted from The Eighteenth Brumaire of Louis Bonaparte by Karl Marx. Download the full text free from Project Gutenberg.