MOSCOW — Britain’s retaliation against Russia in their spy-poisoning brawl includes a small but symbolic slap: No ministers or members of the royal family will attend the World Cup this summer.

The announcement, part of Prime Minister Theresa May’s list of measures announced Wednesday to penalize the Russians, comes three months before England’s team will play in the tournament hosted by Russia, which starts June 14 and lasts through July 15.

She did not call for Britons to boycott the World Cup, one of the most popular global sporting events. Prince William is the president of the English Football Association, the governing body that oversees the country’s national team.

Russia has denied accusations that it was responsible for an attack using a Russian-made, military-strength nerve agent against a former Russian spy, Sergei V. Skripal, and his daughter in Salisbury, England, on March 4.