advice required On beam strength loss

[Bernard1991]

Hey guys I’m currently re wiring a dormer bungalow and decided to check the bathroom fitters electrical work

To my horror the dope decided to drill out notches in the beams instead of moving these four lights to a clear location

Can anyone help on how much strength has been lost due to this?

Also these lights don’t look fire rated to me as they look to be all plastic with a metal effect plastic front/bezel and advice to this?

Thanks
Bernie

 

[Markyd]

Ffs..........