That's rather unfair, on both parties. It does look untidy, but would prevent the mast falling over. It's the ones with no scaffolding that you want to worry about.
I do note that the inner scaffolding has been there long enough to go rusty, and has been strengthened by some newer bracing. That provides a context for these two quotes from the Western Route Plan:
The Signalling Infrastructure Condition Assessment (SICA) system is a well established indicator for inputs into the signalling renewals programme. The Western Route SICA targets going forward into CP5▸ are clearly defined and monitored each period.
Considering the age of the equipment most of it is performing well, with many equipment types (particularly the mechanical signalling infrastructure) still in service long beyond their envisaged service life. The Base Plan has an ongoing replacement and life extension plan for CP4▸ which is driven by asset condition.
So it's "life extension", obviously.