For many countries in Summer time the days are very long meaning that Isha prayer is very late. Can we pray Isha early in Summer?

In Northern latitude such as Europe, Canada and US, Isha time can be very late and Fajr very early. So if there any exception to the rule where we can pray Isha early?

If a person is working early or they face difficulty then on a case by case basis it is permissible to combine Isha with maghrib as long as they go straight to sleep.