Timor-Leste is about 9 times bigger than London.

London (including the 32 boroughs of greater London) is approximately 1,572 sq km, while Timor-Leste is approximately 14,874 sq km, making Timor-Leste 846% larger than London.
Tip: This to-scale comparison of London vs. Timor-Leste uses the Mercator projection, which distorts the size of regions near the poles.