The 08 numbers are classic 'first contact' numbers, designed to attract new business, create a solidly professional impression, maximise advertising response, and give a 'national presence'.

While at first glance 0800 and 0845 numbers may appear expensive to run (as you pay for at least part of the in-coming call costs) they encourage potential customers to make that call, and ensure that you don't spoil a good ad with a bad number.

Look on an 08 number as part of your advertising costs, justified by the increased response an 08 number tends to generate.