Don't know, couldn't find it anywhere. I suggest you ask again. Ask them how you can have a "local rate" on a mobile. The tariff pages do make it clear that non-geographical numbers are excluded, so "local rate" is completely misleading.
The annoying thing is, if you call to ask them, it'll either cost 20p from your mobile, or 0870 rates from a landline.
I think all phone operators should have to provide a table giving the rates for every available code in a standard format, that can easily found by customers. Tesco is particularly bad in not listing costs of 0845 and 0870; others don't give costs of calling 0844 numbers (because there's such a range of prices).
As an aside, while I was looking at the Tesco site, I noticed this:
Quote:*EU is defined as: Austria, Belgium, Denmark (excluding Faroe Islands & Greenland), Finland (excluding Aland Islands), France, Germany, Greece, Ireland, Italy, Luxembourg, Netherlands, Portugal, Spain, Sweden