Luton Library - study environment

At night there are noise disturbance coming from security watching PC or TV etc phone etc what they watching goes through open floor plan on level 1 - 5 we can hear it

Security are based on the ground floor and cannot look at television or a PC. Even if they have to use their radios or mobile phones the noise would only travel up to the mezzanine floor at worse. There is no way that any noise from the ground floor can penetrate through to levels 1 - 5.
At any time of day the library study environment should be at an appropriate level for concentration and research. The silent rooms on levels 4, 5 and 6 are the only areas where enforced Silence is monitored and followed up.
https://lrweb.beds.ac.uk/libraryservices/availableservices/study-env

May I suggest that you use these rooms for study so that you have the silence you require. If you need to talk to other students use the study spaces away from the light well as there won't be any noise drift between floors if you move further away.