Can EU citizens enter UK with national ID card - without passport ?

Can EU citizens enter UK only with national ID card, without need of having a passport ?

EU citizens need a passport to travel to UK after the BREXIT. National ID cards can not be used to enter UK, but there are some exceptions:

https://www.gov.uk/guidance/visiting-the-uk-as-an-eu-eea-or-swiss-citizen

Before you travel to UK, you have to check recent information on the official UK website https://www.gov.uk