From the Harassment Act 1997 - Could this be used against the companies making the phone calls?
http://www.harassment-law.co.uk/
• MALICIOUS COMMUNICATIONS •
A common and particularly unpleasant form of harassment is that involving malicious communications either through the post, the telephone, Fax, by cyberstalking through the internet or, an increasing problem, by the use of Text or SMS messages sent to mobile phones.
Under section 1 of the Malicious Communications Act 1998 it is an offence to send an indecent, offensive or threatening letter, electronic communication or other article to another person and sections 85 Postal Services Act 2000 or s127 Communications Act 2003 there are similar specific offences relating to sending postal or telephone messages which are indecent offensive or threatening. Both offences are punishable with up to six months imprisonment and/or a fine. Because the Malicious Communications Offence is more wide ranging than the Telecommunications offence it is more likely to be charged by the Police than the Postal Services or Communications Act offences.
