This included the forcible removal of the Capel Celyn village residents despite protest and opposition of Welsh MPs.

[3] Construction of the reservoir for Liverpool Corporation Waterworks involved flooding the village of Capel Celyn and adjacent farmland, a deeply controversial move.

[4] The legislation enabling the development was ultimately passed, despite mass protests in Wales, marches through Liverpool by Capel Celyn residents and their supporters, and the opposition of 35 out of 36 Welsh Members of Parliament, with the 36th (David Llywelyn, Conservative MP for Cardiff North) abstaining.

We realise the hurt of forty years ago when the Tryweryn Valley was transformed into a reservoir to help meet the water needs of Liverpool.

Its four turbines are owned and run by Dŵr Cymru and generate 4.38 MW[8] The building of the reservoir also contributed to the final closure of the Great Western Railway (GWR) branch line from Bala to Blaenau Ffestiniog.

Liverpool Council had in fact planned a railway diversion, but this was never built as the British Transport Commission had decided to close the line.