Wagner 250 ml spray
Bought at Screfix/Toolstation. I'm not entirely sure.
I only painted one room, 14 m², twice (Dulux Supermatt paint, mixed with water). If anyone cares, it's like new, cleaned inside (rinsed with clean water).
I have a Graco, so I won't be using it anymore. I can find the receipt, so it's probably under warranty since I bought it 2-4 months ago.