Fixing water ingress on a Peugeot 208!

My daughters car is letting in water. Follow the steps I take to repair it

[@miniwilko57]

Slay bestie 🫶🏻

[@lilyfox9660]

YAY SLAY BESTIE 😂

[@lordgeorge315]

if you send me your e-maill address, I can send you a video which shows where that rain water comes in. A clue: check the trunk and the pool of the spare wheel also....

[@CJax749]

Where does it come in at?
My brother had a 208 and has found some water in the spare wheel well. Trying to find the source of the leak currently