Now in it's 5th year, Ofcom have decided to extend this initiative against 'persons or organisations causing annoyance to consumers through the making of silent or abandoned calls'.
A '24 hour policy' was introduced to ensure that an actual person was on hand if a company intending to use Answer Machine Detection (AMD) more than once within 24 hours. This was accompanied with a maximum penalty of £2 million for persistent misusers.
AMD users had to comply by the 1st February this year, so now Ofcom are continuing to review the complaints coming in, I presume to see if this initiative is being effective or not. We wait patiently to see.