Not much in this for North Wales:
http://www.bbc.co.uk/news/uk-wales-20941072Electrification from Severn Tunnel to Swansea by December 2018
Start of electrification work on the Cardiff and valleys network - scheduled for completion in early part of 2019 to 2024 period
Re-signalling: Newport (two phases complete, third stage planned for 2017); Cardiff area until 2015; Newport to Shrewsbury by 2017; Chester to Llandudno in 2015; Swansea (ahead of electrification)
New platforms at Cardiff Central, Cardiff Queen Street, Caerphilly, Barry, Tir-phil and Pontypridd
South side entrance at Cardiff Central and main entrance at Cardiff Queen Street will be improved
The Welsh government funded north - south Wales journey improvement project to be completed by 2015
Major refurbishment of the metallic spans of Barmouth Bridge
Station improvements, including refurbishment of Holyhead station
350km of track to be renewed or refurbished
Renewing or refurbishing 480 sets of points
SOURCE: Network Rail