Hi Lwiggy and welcome to SayNoTo0870.com.

Lwiggy wrote on Jul 28^th, 2014 at 11:44am:
Calling a geographical number which are numbers beginning 01, 02 or 03 will normally be cheaper than calling an 084x/087x number depending on tariff you have.

However, this isn't always true and can depend on time of day, the tariff you're on and whether calling from a mobile or landline.

For example, calling 084x/087x from a mobile can cost around 25ppm+ (often more) depending on network/tariff you're on whereas a call to a geographical number (01, 02 or 03) will be included in any inclusive tariff you may have.

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Most of the the time basically when you call an 08x number, calls are transferred automatically to a geographical, or a range of geographical numbers depending on how busy that number is.

An alternative number listed may be the actual number the 08x transfers to or it maybe a telephone number for another department (eg reception) who may transfer the call for you.

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Both types of numbers (01,02,03) and 08x are used by the business.

If you provide some basic details of the the landline/tariff you're using and any mobile tariff then I can provide more accurate information for you.

Lwiggy wrote on Jul 29^th, 2014 at 4:19pm:
Free market.  Same could be said why booking holidays during half term when kids are off can cost significantly more money (even double sometimes) than when kids are in school.

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Some companies use VoIP (Voice over IP) which means an 08x number may transfer to a "server" as you put it and so they may not have an underlying 01/02/03.  However, this type of service especially where there is no underlying 01/02/03 is rare.