BT are restricted in what they can do by legislation, local by-laws and inter-utility agreements.
Moles cannot be used as there are too many other services under roads - most of which are not accurately identifiable.
Micro trenching would not be suitable for three reasons - firstly, telco cable need to be a minimum of 450mm below the finished surface, secondly, 20-40mm may be enough for one fibre bundle but in almost every case there is a requirement for several or future expansion and thus the use of 100 or 150mm ducts. Finally, there is no visibility of any other service pipes or cables running in that location and that could include power.
There is also a requirement to lay marker tape above the services, neither moling or microtrenching can provide that additional protection.
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