Simply rejoin the IET and pay the Engineering Council back fees.
If your membership lapsed between one and three years ago:
You need to rejoin the IET, pay your outstanding membership fees and submit six to 12 months CPD evidence along with a future professional development plan. You’ll also need to send your CV to show that you’ve kept up the competencies you demonstrated during your registration assessment.
If your membership lapsed more than three years ago:
You’ll need to rejoin the IET and reapply for registration status. This would mean demonstrating your competence through a professional review, including a full application and interview. You’ll also need to pay the full professional registration application fee and the IET membership fee.
If you're at all unsure I recommend contacting the membership team directly at: membership@theiet.org to discuss your case personally.
