My modern block of flats has a noise cut off at 21:00 in the leases (leasehold block). We also have an active residents management company that each leaseholder is bought into that is responsible for the running of the block. This company has a paid administrator.
In modern society there is an increasing trend to say "what the fuck I needed to do washing so they will have to lump it"
(Not saying this applied to OP but some of responses have made me a bit 
)
The consequences in this block of not adhering to the legal obligations in your lease are that ultimately you can forfeit your flat.
Yes, that is right a flat you own.
It would be a long drawn it process but it could be done for repeated infringements.
In this block if you are a tenant taking the piss the mgt company (i.e. The paid administrator) collated negative feedback & forward it to the owners.
Most of the time (we have had 2 troublesome tenants in five years out of 50 flats) the landlord has chosen not to renew the lease.
Why would they risk their property because a tenant is being a twat.
Last person it happened to wrote a vitriolic email about how mgt company had lost him his tenancy. The property manager (who doesn't live here and never met him) wrote him an email back pointing out he had done that by himself by continually practising his drumming late at night despite multiple contacts asking him not to and patient explanations about the restrictive covenants in the lease etc.