For example, if we take the centre of Southeast London (around Peckham) and the centre of North London (around Highgate), the distance between them is approximately 11 miles (17.7 kilometres) as the crow flies. However, if we consider the outskirts of Southeast London (such as Thamesmead) and the northernmost part of North London (such as Enfield), the distance between them can be as much as 20 miles (32.2 kilometres).
Overall, Southeast London and North London cover a large geographical area, and the distance between them can vary depending on the exact locations being considered.