This collection gathers sound levels monitoring datasets acquired in Central London, starting from February 2021. It is part of a project for long-term noise monitoring being carried out at the UCL Institute for Environmental Design and Engineering. Several monitoring stations are being installed. Datasets will be made available on a monthly basis and named after the site where the station is located. Noise indicators available in the datasets (1-minute resolution) are: LAeq, LAFMax, LAFMin, LCeq-LAeq, LAleq-LAeq, LA1, LA10, LA50, LA90, and one-third octave bands. More details could be available on request, by approaching the project team members.