Clydesmill Substation Extension and Overhead Line Upgrade
Public Consultation Feedback Form

The last day for submitting feedback is Friday 27 February 2026.

SP Energy Networks is upgrading the grid in central and southern Scotland. With total electricity demand set to double by 2050, we need a grid that’s ready to meet future energy needs, while boosting the nation’s energy security for generations to come.

To help make this happen, we need to extend Clydesmill substation, in Cambuslang, and increase the voltage of an existing overhead line between Clydesmill and Denny North substations from 275kV (275,000 volts) to 400kV.

This will help strengthen the electricity transmission network and guarantee secure energy supplies for the future.

We will also need to alter the overhead lines where they enter the substations to connect them to the new equipment.

In February 2025, we consulted local people on our initial proposals. We have now refined our plans, and we are holding a further public consultation so local people can give us their views.

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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 Clydesmill Substation Extension and Overhead Line Uprating, 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/dwup

Have your say

You can submit your comments in a number of ways

  1. Complete a paper feedback form and return it to us by post for free (just put it in an envelope and write FREEPOST SPEN DWUP 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 clydesmill@communityrelations.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 extension;
  • Your views on the proposed uprating of the existing overhead line between Clydesmill and Denny North substations;
  • Your views on proposed alterations to the overhead lines where they enter the substations;
  • 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. Clydesmill substation extension

We need to extend Clydesmill substation to accommodate new 400kV transformers, circuit breakers and other equipment, so we can increase the voltage of overhead lines from 275kV to 400kV. Our proposals also include earthworks, drainage, fencing, vehicle access routes and parking.

Do you have any comments on our plans for Clydesmill substation?

Q2. Overhead line uprating

We need to increase the voltage of one of the circuits – the east side – of the existing ZD overhead line between Clydesmill and Denny North substations from 275kV to 400kV, to increase network capacity and ensure greater security of energy supply for the local area in future.

Do you have any comments on our plans to increase the voltage of the existing overhead line?

Q3. Overhead line alterations at Clydesmill substation

At Clydesmill substation, we will need to install one new tower (pylon) and a section of overhead line to the north of the site, to replace one tower and a short section of overhead line. South of the site, we will need to install one new tower and remove two existing towers.

Do you have any comments on the proposed overhead line alterations at Clydesmill substation?

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








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

Thank you

Following this round of consultation, we will finalise our design for the substation layout, including proposed locations for buildings, equipment, internal access routes, landscaping and drainage.

We will be hosting additional events to present our detailed plans and explain how we have considered any feedback received.

Details of those events are as follows:
Wednesday 18 March, 10am to 2pm: Halfway Hall, 26 Graham Avenue, Cambuslang, Glasgow G72 7RB Friday 20 March, 2pm to 7pm: Cambuslang Institute, 37 Greenlees Rd, Cambuslang, Glasgow G72 8JE

We plan to submit a planning application under the Town and Country Planning (Scotland) Act 1997 (as amended) to South Lanarkshire Council in 2026.

We will also need to submit applications to the Scottish Government Energy Consents Unit, under Section 37 of the Electricity Act 1989, for the proposed changes to the overhead lines and uprating in voltage.

At this stage, your comments are not representations to the planning authorities. It is when we submit applications for development consent in the future that you will be able to make formal representations to the planning authorities.