On 25/03/2012 16:56, Leo Bicknell wrote: > Fiber has a 20-50 year life. most of the expense of laying fibre is associated with ducting + wayleave. Once you have that in place, blowing new fibre is relatively inexpensive. So rather than amortising the cost according to the lifetime of the fibre, it makes much more sense to amortise over the lifetime of the ducting. Nick