The main impact for you will be that it has a negative effect on your credit rating. Credit reference agencies will assess the level of risk based your on financial history. which may include a Scottish Trust Deed, however, once your Scottish Trust Deed is completed, you can start to rebuild your credit rating.
If you fail to make a payment under your Scottish Trust Deed agreement without first contacting your Trustee for discussion and permission, you may find the Trust deed fails and your unsecured creditors are entitled to pursue you for sequestration.