In message , at 19:34:26 on Sat,
29 Apr 2017, Theo remarked:
Doesn't matter. The 220m spans of the Ouse viaduct are much more of
an engineering challenge than 75m of spans at Hardengreen plus some
solid embankments.

Compared to many miles of Borders Railway with lots of bridges and tunnels
too. Stop being silly.

Roland also omits having to construct a new alignment for the City of
Edinburgh bypass, build a bridge under the old route, and then move the
bypass back again

Let's not forget the Borders Railway had three times the budget.
--
Roland Perry