Signing off as “proud owner of CAFC”, Sandgaard wrote a letter to Charlton fans on social media.
“Today is the day!" he said. "We did the impossible. We triumphed and we made it to this point because of you. Thank you for your passion, your perseverance, and your patience. There is no club without you. We are Charlton Athletic Football Club (CAFC).
"From early on I felt that we were in this together. I am humbled by your support and honoured to officially become part of the Charlton family. The Charlton community is one-of-a-kind. You welcomed and embraced this change of hands with more openness than many others would have given your history.
"Thank you for standing up for you what you believe in. I will not let you down. Cheers to each of you. Cheers to Charlton! I assure you we are just getting started. We are London’s Club.
“This week and every week we will #CheerForCharlton!”
More to follow…