Our lawyers handled 61 calls from consumers complaining about the telecoms giant, with gripes ranging from collection and billing problems to complaints about customer service. Which? has contacted BT and we'll publish its response when we receive it.

Installation problems and general customer service issues helped drive Virgin Media to second place in the monthly complaints table, with our lawyers taking 39 calls about the company.

Billing problems

In third place was British Gas. Which? Legal Service took 36 calls about the utilities company, with billing problems and annual service contracts being the main cause of complaints.

Talk Talk and Orange notched up 23 and 21 complaints respectively, followed by Barclays, with 14 complaints, and Comet, Currys and Tiscali , with 13 complaints each.

Other hot topics for the lawyers included cashback on mobile phone contracts, ISP connection/contract issues, debt collection agencies and international lottery scams.