Not in my view as the lengths are presumably very short and therefore very unlikely to present an entanglement or entrapment risk for escapees or fire fighters.

the longest run is 2m which I will clip to the joist though the trunking, it is a strange setup as each light has its own pull switch (after the wall switch) so they can be turned off if not required  

Its a small shop so that's been modified over the years

No, the cable does not have to be secured in the switch box or junction box. If you use a deep urea formaldehyde surface pattress (hard white type) it will be fire resistant anyway and if fixed with wood screws into a ceiling joist it will be very securely affixed, along with its cable.

Z. 

Excellent, thank you

Does having an additional switch on each light cause any problems?  

I would have preferred one switch for each light, but it would be impossible as I cannot get access to the above property   

Nothing electrically wrong in the arrangement, but it is a little unusual. Some risk of confusion if the users fail to understand that both the wall switch AND the local pull cord switch must be turned on.

Some users are unable to grasp the difference between TWO WAY switching whereby a light may be controlled from two locations, and the arrangement described.

This used to be common in large offices and works, in order that the manager could turn off ALL the lights with one switch or a small group of switches near the exit, but each worker could turn their own light on or of as desired.

broadgage said:

This used to be common in large offices and works, in order that the manager could turn off ALL the lights with one switch or a small group of switches near the exit, but each worker could turn their own light on or of as desired.

Thank you, you have perfectly described it, that’s how it works at this shop.

They just want the old tube battens replacing for LED lights