When I used to live on Umfreville Road, our neighbour at no.16 (corner with Woollaston) decided that as well as keeping several chickens in his courtyard rear garden, it would be a good idea to get a cockerel too. He claimed he needed a cockerel as otherwise his chickens wouldn't lay eggs!
As our bedroom was at the back of the house looking down on the courtyard, needless to say, it didn't take long before we were forced to take evasive action. So I phoned the council (can't recall which department but may have been noise enforcement) who said that it definitely wasn't legal considering the inevitable noise. Armed with that information, I told the neighbour that it just wasn't on and a few days later, the rooster was mysteriously silenced, never to be heard (or seen) again.
So it may be worth hanging around that corner (at 5am) to see if our old neighbour is up to his farmyard ways again.
if you can find out who has the Rooster/cockerel, you might suggest this solution, roosters crow at lights, the sun in the morning, other lights at night. it seems that lowering the roof of their cages so they cannot hold their heads up high is the best, also before lowering the ceiling try completely darkening their cage at night time.
Hope that helps, Sleep deprivation is torture.
Ear plugs are indeed great but, as anyone working for the fire brigade will tell you, not for regular use as they may prevent you from hearing your smoke alarm.
Air rifle perhaps? (only kidding)
has anyone reported it to the noise enforcement team at the council yet? that would seem to be the first step. They can help try and work out where it is coming from but only if they know it is happening.
I am on Burgoyne but north side so have not heard it yet.