Due to a new legislation, those struggling with debt can now apply to have it written off. For Free information reply INFO or to opt-out text stop. Free Text!In this case, the spam originated from +447977237820 although these numbers change regularly.
If you get one of these, you should forward the spam to your carrier. In the came of T-Mobile, O2 and Orange the number to report to is 7726 ("SPAM"). Vodafone customers should use 87726 ("VSPAM") and Three customers should use 37726 ("3SPAM"). Hopefully the carriers will act if there are enough complaints.
There's a good article about protecting yourself from unscrupulous debt management companies here.