found it http://s3.eu-west-1.amazonaws.com/files.mylmc.co.uk/websitefiles/1/1162/Letter%20for%20Mandatory%20Certificate.pdf?X-Amz-Expires=600&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAJVI6P7KHDNQ6UXDQ/20180129/eu-west-1/s3/aws4_request&X-Amz-Date=20180129T151652Z&X-Amz-SignedHeaders=host&X-Amz-Signature=f1214d72e443d8a49adf80d791fa65824c6c52369afc07ec78dcb112ff8ad216
