The Premier League is to bring in a new owners’ charter to stop future attempts to join a breakaway Super League.
All owners will have to sign up to the new rule “committing them to the core principles” of the league with breaches punished by “significant” sanctions.
The Football Association said an inquiry into the six clubs has started.
“The actions of a few clubs cannot be allowed to create such division and disruption,” the Premier League said.
“We are determined to establish the truth of what happened and hold those clubs accountable for their decisions and actions.”
The Football Association added: “We wrote to all of the clubs to formally request all relevant information and evidence regarding their participation.
“Once we have the required information, we will consider what appropriate steps to take.”
The Super League proposal, which also included some of Europe’s biggest clubs, collapsed within 72…
