Hello, It's possible that the current work (by the Apollo Group) on Shackleton Close estate is where you are hearing the noise from, although they do not usually start before 8am or so.
We are not right by the London Road side but very close; just over the fence from you.
I live on the estate and we have had scaffolding up and work going on since (approx) February; mostly all scaffolding down now but still some work is being done.

Regards

Sue