Removing the Exhaust valve timing control solenoid valve. Many YouTube videos will say to jack up the engine and remove the engine mount. You do not need to do this; the part can be replaced from below. The first photograph shows the solenoid's position viewed from above. As you can see, the engine mount blocks access to it from above.

Using around 16 inches of extension bars and a 10mm socket, I used a deep socket. Lie under the wheel arch and reach up to the single retaining bolt. Unscrew it and carefully retract your extensions so as not to drop the bolt.

The final photograph shows the longest of the two extenders with a 10mm deep socket, and the retaining bolt still in the socket!