Knocking sound from front of car at low speeds?

[DJames93]

I picked up a car a month back. It is a VW Polo GTI and has covered 42k miles. It has been upgraded and lowered with Bilsteins by the previous owner.

At first I don't think this was happening, but over the last week, I have noticed a knocking sound which I think may be coming from the front. It happens at low speeds, and when steering, both forward and in reverse, and also happens on flat/smooth roads (no speed bumps/potholes). It is quite consistent and not too intermittent once it starts and something tells me it may be worse the warmer the weather.

Here is a small clip where you can hear it. Most noticeable 15sec onwards when the indicator cancels. https://photos.google.com/share/AF1QipPvPJ3xF6gGe-...

any ideas?