Denny to Wishaw Network Upgrade
Public Consultation Feedback Form

The last day for submitting feedback is Friday 28 February 2025.

Scotland is producing more clean, green energy than ever before, and we need to strengthen the transmission network so we can get it to the homes, schools and businesses that need it.

The Denny to Wishaw Network Upgrade is needed because the high-voltage transmission network in central Scotland will soon be at full capacity – unable to accommodate all the clean, green renewable energy we will all need in future.

It will link up existing transmission lines and allow an additional 1,000MW (megawatts) of green energy to flow through the electricity transmission network, helping Scotland and the UK meet Net Zero climate change targets.

The proposals include extending the existing substations at Denny North, Bonnybridge, Cumbernauld, Easterhouse and Wishaw; increasing the voltage of three existing overhead lines from 275kV (275,000 volts) to 400kV; and building a new overhead transmission line between Bonnybridge and a point near Glenmavis, where it will join an existing overhead line.

We first consulted on this project in 2021. Since then, we have updated the proposals, and we are now consulting on the revised plans.

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Keeping your details safe

SP Energy Networks is committed to respecting your privacy and will comply with all applicable data protection and privacy laws. We’re consulting you to get your views on our plans for the Denny to Wishaw Network Upgrade, so we may need to share your information with certain other bodies for the purposes of the consultation and for creating reports. These are: other ScottishPower Group companies; third party service providers, contractors or advisors who provide services to us; and relevant planning authorities.

More information

More information about the project and the consultation process can be found in the project leaflet and on the consultation website https://www.spenergynetworks.co.uk/pages/denny_wishaw.aspx

Have your say

You can submit your comments in a number of ways

  1. Complete this feedback form and return it to us by post for free (just put it in an envelope and write FREEPOST DENNY WISHAW UPGRADE on the envelope in a single line. Nothing else is needed); or
  2. Complete this online version of the form
  3. Email us your comments at info@dennywishaw.co.uk; or
  4. Call us free of charge on FREEPHONE: 0800 470 2376

What we are consulting on

In this consultation, we’d like to know:

  • Your views on the proposed substation extensions;
  • Your views on the preferred route for the new overhead line between Bonnybridge and Glenmavis;
  • Your views on the proposed changes to existing overhead lines, including increasing the voltage;
  • If you have any comments about the consultation process;
  • Any other factors you would like us to consider. We would particularly like to hear your views on your local area e.g. areas you use for recreation, local environmental features you would like us to consider.

We will publish a report of this round of public consultation, explaining how we have taken account of feedback received.

Q1. Proposed new overhead line between Bonnybridge and Glenmavis

We need to install a new double circuit 275kV / 400kV overhead line, running north-south from Bonnybridge 275kV substation to a point near Glenmavis in North Lanarkshire, where it will connect to the existing 275kV overhead line (known as XX Route) that runs between the Easterhouse and Newarthill 275kV substations.

A ‘spur’ from the new overhead line to Cumbernauld substation (approximately 750m), will allow us to remove the existing11km 132kV overhead line (CB route) between Bonnybridge and Cumbernauld substations.

Please let us have any comments on the preferred route for the new overhead line, removal of the CB route, and anything you would like us to take into account when developing our plans.

Q2. Substation extensions

We need to extend five substations to accommodate new equipment, so we can operate the transmission network at 400kV (400,000 volts).

Which proposed substation extension do you wish to comment on?






Please put your comments in the box below.

Q3. Please let us have any comments about our proposed reconductoring and increase in voltage from 275kV to 400kV of the existing overhead lines in the wider area, as identified in our consultation materials.

Q4. How did you find out about the project and the consultation?








Please specify

Q5. Do you have any comments about our public consultation, or any other comments you would like to make?