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Important: Letters of Authority

13th November, 2019

Have you returned your LOA? 


There is limited funding available from the National Grid for necessary upgrade works to your wind turbines safety relay to be made. If you miss out on the funding the upgrades will still need to be made at a later date at your own expense.

By now all Endurance turbine owners should have received a letter of authority that needs to be signed and returned. Without the LOA we are unable to process your application therefore it is important that you return the letters as soon as possible. 

The below link provides you with an electronic version that you can print out, sign and return by email to 

If your site has more than one export MPAN number, a letter is required for each MPAN. 


Click here to download the Letter of Authority