Image_1.png
Google reverse image search returns many similar results:
“Matilda Cake”
The first link brings me to an Instagram post from Parker’s London. This is actually the same image we were given but uncropped. I see that it has the same cake insert and paper (including logo) under the cake:
I Googled the business to find more information, including their address: https://byparkers.com/uk/#about
Jumeirah Lowndes Hotel, 21 Lowndes Street, London SW1X 9ES
I used this to submit the expected flag: C1{Parker’s_Lowndes}