"Derby County Football Club can confirm that they have granted permission for Chelsea Football Club to speak to Frank Lampard about the vacant managerial position at Stamford Bridge," Derby said in a statement.

"With pre-season fast approaching for both clubs it is hoped this will allow holding Europa League champions Chelsea to swiftly conclude their discussions."

Lampard is Chelsea's record goalscorer after netting 211 goals from midfield between 2001 and 2014 at Stamford Bridge, where he won three Premier League titles, the Champions League and Europa League in a 13-trophy haul.