@Spidermech_
We can't give you an answer on behalf of O2 as we are all customers here like yourself but the most likely cause is congestion on the masts slowing everything down.
There is a programme of network improvements being rolled out by O2 which is supposed to tackle the worst areas but we don't know where or when these will happen.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
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