They dont allow the call to prayer in mornings anyway in england in the one mosque that does amplify the call.
The calls to prayer vary according to the time of year, the dawn call to prayer happens at 6:30am at the moment, it can be very early in the summer tho.
As this is not a muslim country I wouldnt expect people to tolerate or accept it. Taking into consideration that expats living in dubai tried to get the call to prayer banned in a country which they were only guests in I doubt very much they would allow such an imposition in their own country.
The call to prayer I think is beautiful, I understand what they say, and given the right muezzin I used to look forward to hearing it when I was in muslims countries. The call to prayer is a reminder, it's pretty amazing to watch people shut up shops and leave their work behind all heading towards the mosque man woman and child....
In the UK, we have adhan (the call to prayer) monitors in our homes, which are tuned into our local mosques, when the muezzin switches on the internal mike the call to prayer is transmitted directly to our homes, we also get to listen to the actual prayers, and wedding ceremonies and death prayers and sermons over the adhan monitors without disturbing the neighbours.... I would absolutely hate for my neighbours to be distrubed by my acts of worship, it would simply nullify the prayer I think.