LONDON (AP) — British energy officials say England and Scotland’s group games at the World Cup could start a national electricity spike equivalent to the combined power needed for the northern England city of Leeds and Glasgow.

An analysis by the National Energy System Operator released Saturday predicted that each of England and Scotland’s games in the group stages of the World Cup could see national electricity usage increase by 600 megawatts.

That is the equivalent of the total electricity demand for the cities of Leeds, with a population of about 812,000, and Glasgow, which has a population of 650,000 and is the largest city in Scotland.