How much a does a UK national call cost?
If you are using Just-Dial from a BT phone, BT Standard prices are as follows:

7.91p per minute during the day including VAT
3.95p per minute in the evening including VAT

Remember to use 0870 794 7021 during the week.

At weekends it's just 5p minute including VAT
Remember to use 0844 570 7021 at weekends.

It can be even cheaper
If you have BT together, Peak is just 7.51p, and off-peak is 3.75p all inc VAT! Plus, if you're a Business user and reclaim VAT you'll only pay 6.73p Peak and 3.36p off peak!

Destinations available at a UK National rate:
Europe
Athens, Austria, Belgium, Denmark, Estonia, Finland, France, Germany, Iceland, Ireland, Israel, Italy, Liechtenstein, Luxembourg, Moscow, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland,

Americas
Canada, Chile, Puerto Rico, Rio De Janeiro, Sao Paulo, US Virgin Islands, USA landline USA mobiles.

Australasia & Asia
Australia, China, Hong Kong, Japan, Malaysia, New Zealand, Singapore, South Korea.

Prices from the BT website October 2002 E&OA. You will need to check with your service provider if you are calling from a mobile or are a cable customer. Also there is a surcharge from BT payphones, please check at the point of making your call.