my engineer travelled down the rear of the guttering pipe and matched the cable ties to the colou rof the pipe. fairly neat job and nice and discreet until at the bottom where it travels along the wall low to the ground and into my lounge (was able to choose where i wanted it to enter)
i was the new connecterized method so didnt need a CSP either.
any possibility this can be done to yours?
Im not sure, however if its connecterized there is no CSP and they simply go through a hole in your wall (i got them to drill a new one other side of Window) so may be able to do the same.
If it is the splicing method then they will need a CSP but i am unsure of what the requirements for the CSP would be for engineer access
sorry i couldnt share any more information