If your application for an ECS Electrical Labourer states you must prove employment with an electrical contractor, the minimum information we require is: 

• The letter must be on company headed paper
• It must include your name.
• It must confirm that you are employed with that company as an Electrical Labourer and the date you started employment. 
• It must be signed by the your employer, detailing their name and position. 

If you normally work for an employment business, you should obtain a signed letter from the business to confirm your dates of engagement as an Electrical Labourer.