This publication is just over a year old now, but I don't believe it's been mentioned:
2. Costs incurred in getting through to utility companiesLengthy calls to utility companies waste not only time but also mean that the customer often incurs substantial costs. Since freephone
numbers are not widely used among utility companies, with some notable exceptions such as EDF Energy and E.ON, the time that a
customer spends on the phone can add quite significantly to their bills.
In general, most utility companies provide customers with a non-geographic number, such as 0845 or sometimes an 0870. The rates charged for calling 0845 and 0870 numbers vary between telephone operators, with calls to 0845 numbers generally costing between 2-5 pence per minute from a landline during the day, while similar calls to 0870 numbers cost between 6-10 pence per minute.
19 While such rates may not appear exorbitant, the amounts charged are usually in excess of calls made to geographic numbers, and where protracted calls are involved the costs for customers can soon mount. Lengthy calls are far from isolated incidents. Since many calls last longer than 30 minutes many customers will have incurred between 60 pence and £1.50 just for making this call (depending on the exact charges levied by their landline provider).
Unsurprisingly, many customers are unhappy with these costs. Fifty eight percent of the people who completed the Adviceguide survey stated that they were dissatisfied with the costs involved, with only 15 per cent claiming they were satisfied with the charges. In addition, the survey conducted by Ipsos MORI revealed that almost one in three people (31 per cent) who had called a utility company in the last 12 months were annoyed about the cost of making the call. This compares to just 22 per cent for those who called financial institutions and 24 per cent who called retailers or government agencies.
Customers who must use their mobile phone to call their utility company on a pay-as-yougo or contract basis generally get an even worse deal. Not only are non-geographic numbers like 0845 or 0870 numbers rarely included in the free minutes which mobile users may benefit from, but the costs of calling these numbers are also significantly higher than from a landline. Costs vary by mobile phone provider as shown in Table 2. Calls from a mobile phone to 0845 or 0870 numbers generally cost between 15-25 pence per minute, though some providers charge much more or fail to provide transparent pricing information for such calls. Even freephone (0800) numbers fail to live up to their name for mobile users since they will usually end up paying at least 15p per minute to call these ‘free’ numbers.
Such charges can hit some of the poorest members of society hard, since consumers who do not have a landline connection and have only a mobile phone in their household are more likely to be in social grade DE and earn less than £11,500 a year.
21[…]
Footnotes:
19 See
www.saynoto0870.com for a useful source of information on charges for calling non-geographic numbers.
20 Ibid.
21 The Consumer Experience 2007, Ofcom, November 2007, p.18
The document continues with a table showing call rates from various tariffs.