Alarmingly, they have conceded two or more goals in their last 10 matches, equalling a sequence set by the club just once before, in 1951.

They are also still the only team in the entire English Football League not to manage a clean sheet this season, and it was easy to see why.

After 15 minutes Forest were ahead when Portuguese defender Figueiredo outmuscled Todd Kane at the far post to guide a simple header past Joe Lumley from Joe Lolley's corner.

On the half-hour Rangers failed to clear another corner and were grateful to see Sammy Ameobi's flick land straight in the arms of Lumley.

The hosts had offered little threat in the first half until Ilias Chair forced a couple of sharp saves from Brice Samba shortly before the interval.

Rangers manager Mark Warburton was facing the club who sacked him in 2017 for the first time, and his chances of revenge looked even bleaker after last-man Wallace was dismissed for tugging Lolley to the ground.

Yet Rangers should have been level on the hour after Josh Scowen met Kane's cross eight yards out in front of goal, only to plant his header wide.

Figueiredo almost helped himself to a second only to see his header cleared off the line by Scowen, but in the 81st minute Grabban doubled the lead, arriving at the far post to finish Ameobi's cross.

Rangers promptly collapsed and Carvalho skipped around a couple of non-existent challenges for the third before fellow substitute Semedo tapped in a stoppage-time fourth.