Portsmouth’s poor form continued as John Mousinho’s league leaders made it one win in six games by slipping to a shock 3-0 defeat at home to Leyton Orient.

A disastrous opening half saw stuttering Pompey conceded all three goals before the break.

Orient could have been ahead inside the first 10 seconds, but Dan Agyei’s shot was deflected for a corner.

They did take the lead after 30 minutes when a one-two between Shaq Forde and Max Sanders saw Forde score easily.

It was 2-0 five minutes later when Jordan Brown stabbed home after a goalmouth scramble.

Pompey had a chance to get back in the game after 40 minutes with a penalty after a foul on Jack Sparkes, but Colby Bishop’s tame effort was easily saved.

Things got worse for Pompey in the last minute of first-half added time when Agyei headed home from a corner.

Orient maintained their dominance in the second half, stifling Pompey’s efforts to get back into the game and came away worthy winners.

Leyton Orient manager Richie Wellens was delighted to secure a 2-1 win against Reading after a difficult week for the club.

The O’s match with Lincoln on Tuesday was abandoned when lifelong supporter Derek Reynolds was taken ill and died later that evening.

Wellens had seen his team dominate the early exchanges against Reading to deservedly take a first-half lead through a Jordan Brown piledriver before Tyler Bindon equalised ahead of the interval.

But the points were secured in the 90th minute by George Moncur, who stepped off the bench to apply the final touch after a goalmouth scramble following a corner.

“It was a really emotional afternoon and I thought the club as a whole today made it a brilliant day to remember a lifelong supporter and someone who worked for the football club,” Wellens said.

“It’s been a very tough 72 hours. Finding that motivation to get going has been difficult

“We had to work hard in the end. We were totally dominant in the opening 20 minutes. We created loads of chances, we hit the crossbar and we found it easy to play round them but then they changed it when we scored and they blocked us up a bit.

“We’re still an emerging side, naive at times and tactically we have to get better while the game is happening but I can’t be prouder of the players as our points return has been really good.

“Jordan Brown epitomised what we’re all about. He was excellent today; picked pockets, kept possession and technically he’s a very good footballer which was demonstrated from the goal he scored.”

Reading remain in the relegation zone and manager Ruben Selles acknowledged that his side need to address their shortcomings.

“We competed well but it’s another moment late like the Exeter game where we lose the game in a situation we could have easily solved,” he said.

“We came here to compete and we were in the game. We came back after the first goal but we need to improve.

“Our pressure was not quick enough at the start of the game so I made a couple of modifications and we started to defend better. We went back to our system we know to get more pressure on the ball and it stopped the crosses coming in from the opposition.

“We lost Sam Hutchinson before the match as he was feeling his hip. He could run but not kick the ball so we had to made a change and brought in Charlie Savage.

“There is always pressure in football but there has been a lot of things out of our modifications of building the team but I will not make excuses. We came here to compete.”

George Moncur’s 90th-minute strike gave Leyton Orient a 2-1 win over Reading at Brisbane Road.

Jordan Brown’s opener was cancelled out by the visitors’ Tyler Bindon but Moncur settled the issue in the final minute of normal time.

Joe Pigott was twice denied early opportunities to open the scoring as his powerful header crashed against the crossbar and then David Button went at full-stretch to save his shot.

Orient were rewarded for their persistent pressure when Brown completed a five-man move by slamming an unstoppable 20-yard shot past Button for the opening goal after 26 minutes.

At the opposite end, Lewis Wing had an effort spilled by O’s keeper Sol Brynn but they levelled on 35 minutes when Ballard headed against the upright but Bindon rolled the ball into the net.

Both keepers were kept busy after the break with Brynn denying Harvey Knibbs and Wing while Button thwarted Ed Turns and Theo Archibald.

But the Reading keeper missed a corner late on and Moncur was first to the ball in a goalmouth scramble to give Orient the points.