$25-100 for what? You'll generally see pricing between $7 and $20 per amp. Wide range since electricity is more expensive in some places and some places actually calculate in the additional costs for that power consumption such as the additional cooling needed, etc.
So 10A in the UK is 2200VA. In the US its only 1200VA. So even if the power company cost is the same then the rate per AMP should be almost double in the UK.