Hi, thanks for the reply cant find my meter but might connect an extra ground wire to see if that solves the porblem. If it does try and find the original wire and re fit it.Welcome to the Forum,
This is the Ceed Electrical Manual but very likely to be the same as the Pro
Pages 15 to 19 have the Fuse Box assignments.
Page 127 has the Headlamp wiring diagrams
Page 141 has the Side (referred to as Parking) Lights.
There is one Fuse that does both High Beams
There are individual Left and Right Fuses for the Dipped Beam
The Side Lights are on the same Fuse as the Rear and Number Plate Lights.
Each Headlight has it's own Ground but also used for High Beam so probably not that.
Actually the Main Beam is an H1, so grounds through the Body of the Bulb
The Dipped are H7 so have a ground wire to the Bulb and the Side are W5W which also have two Wires.
Suspect dodgy ground Wire to Dip and Side.
Have you got a Multimeter?
I had a similar problem on a Micra many Years ago.
Could not trace what the fault was, so cut the wiring and added two Relays that were triggered by the other Headlight.
Not suggesting that at the moment.