A mortgage offer is valid for at least 3 months, but for many lenders it can be 6 months. Whether you’ve secured a rate early and now simply waiting for your Early Repayment Charge (ERC) to end, or there’s a delay at completion due to personal reasons, you have that safety net.
To complete, you’ll be instructed a solicitor during the application process who will guide you through the latter stages, but after you’ve returned their pack, there’s little left for you to do. Simple.