Ticking/Rattle sound

[G-A123]

I have a 2018 Leon 1.5. I have noticed a ticking sound that can be heard from inside the car with the windows up, and can also be heard from outside coming from the engine. The sound isn't constant but is there for the majority of the time, I have noticed that once I take my foot of the accelerator and the eco like comes on when rolling that seems to trigger it. But it also sometimes happens when accelerating and sometimes when the car is sat still. Anyone else had this problem before? Thanks.