Chelsea have admitted their "regret" at not giving more consideration to allegations against referee Mark Clattenburg made by their players.
The admission follows a meeting which took place on Monday afternoon at St George's Park between Professional Game Match Officials Limited (PGMOL), the Premier League and Chelsea chairman Bruce Buck.
The FA dismissed complaints last week that Clattenburg had abused Jonn Obi Mikel during Chelsea's defeat to Manchester United in October.
In return the referees say they understand the club was duty-bound to make a complaint given the allegations.
A joint statement made by all parties said: "There was a constructive and open discussion. The club regrets not having given more consideration before issuing a statement on the evening of Sunday 28th October.
"The club also regrets the subsequent impact the intense media scrutiny had on Mark Clattenburg and his family.
"The referees accept that, given Chelsea FC had received a good faith claim from one of their employees, the club had an obligation under FA rules to report the allegation.
"There was recognition by all parties that the impartiality and integrity of refereeing in this country remains paramount.
"Chelsea FC made it clear they would welcome Mark Clattenburg back to Stamford Bridge in the future and PGMOL would have no issue in appointing him to a Chelsea FC match going forward.
"It was a thoroughly professional meeting. All parties now believe it is time to draw a line under this incident, learn from it and move on for the good of all Premier League clubs, players and match officials."
Former Leeds, Everton, Newcastle, Bolton and Sheffield United midfielder Speed was found dead at his Cheshire home at the age of 42, provoking an outpouring of grief for a man liked and respected throughout the football community.
Staff at the Football Association of Wales, including current Wales boss Chris Coleman, today met to remember Speed at the governing body's headquarters in Cardiff.
Flowers were laid while an image of Speed outside the building was lit up.
Several Wales players and coaching staff were among those to pay tribute on Twitter to the man who had guided Wales to four wins from his last five games in charge.
Tottenham star Gareth Bale, posted: "Remembering Gary Speed 1 year on ?RIP", while Celtic midfielder Joe Ledley tweeted: "A year ago today a legend left us, but will never be forgotten. Rip Gary speed."
Striker Robert Earnshaw, who played alongside Speed for Wales, said: "Remembering GarySpeed today.R.I.P. I learnt alot from him."
John Hartson, another of Speed's former team-mates, now part of Coleman's backroom staff, tweeted: "It's one year today since we lost a wonderful man. My thoughts today are with his family.. God bless."
There was also a message from Sepp Blatter. A post on the FIFA president's official Twitter site read: "Thoughts with Gary Speed's family 1 year on from his passing. Sadly missed by the game he served with such distinction"
All of Speed's former clubs posted messages in his memory and there will be a minute's silence at Elland Road, where Speed began his career and won the 1992 league title, ahead of Leeds' Championship fixture against Leicester this evening.
Former Wales midfielder Matt Jones took part in a 24-hour cycle in memory of Speed.
The 32-year-old had already completed a series of half-marathons, the London marathon, a run up and down Mount Snowdon, and a sky-dive, raising thousands of pounds for charities supported by Speed, including the Bobby Robson Foundation, the John Hartson Foundation and the Spinal Injuries Association.
The Hoops boss dramatically threatened to quit the club after an altercation with several disgruntled supporters during the shock 1-0 Scottish Premier League defeat by Inverness at Parkhead on Sunday.
Caley's first league win in the east end of Glasgow was met by a chorus of boos by the home fans but despite the champions having dropped 17 points - four less than in the whole of last season - they remain top of the SPL by one point and can look forward to a Champions League Group G decider against Spartak Moscow next week.
Ahead of Wednesday night's trip to Hearts, the former Celtic skipper reflected on the weekend's events with the help of some humour.
"I regret it, yes, of course," said Lennon. "It's not something I want to do.
"But if I think it (criticism) is unjustified I will voice my opinion.
"I am defending my team. I know it is difficult for fans because they are passionate about the team and want them to do well but sometimes it doesn't help.
"I wasn't getting any stick personally, it was directed towards the team and I was defending the team because they are giving me everything.
"I think the world of my players and think the world of my supporters as well.
"But if I was the manager of Accrington Stanley I would do exactly the same time - although the way the results are going, I might soon be."
The Northern Irishman knows from his time as a battling midfielder at Celtic Park that criticism comes with the territory but he insists there is "no division" between him and the supporters.
He said: "We are not happy with our recent home form but we are progressing, we are still in four competitions, we are top of the league albeit not playing as consistently as we would like.
"So at times we need a wee bit of patience but you don't always get that at big clubs, and I understand that.
"I'm sure we had our bad spells under Martin (O'Neill) and Gordon (Strachan).
"I can remember coming back from the San Siro after we lost to a Kaka goal in the last 16 of the Champions League (against AC Milan), and then we lost an Old Firm game 1-0 after playing quite well.
"We were getting dog's abuse although we were still 13 points clear at the time.
"So sometimes you set the bar high and if you don't meet the expectations the fans do voice their opinions, which they are entitled to do.
"If the support are not happy with what they are seeing and voice their displeasure then I will review my situation. That's always been the case from day one.
"But there is no division here. I was expressing an opinion.
"I think they are right to expect us to win at home against Inverness, Kilmarnock and St Johnstone.
"We expect that as well and it is obviously an area we have to improve on."
A lack of atmosphere against Inverness was accentuated by the absence of the Green Brigade, the vociferous and occasionally controversial section of the Hoops support who boycotted the match after claiming they had been subject to "oppressive police tactics."
It is understood the Green Brigade, which number a few thousand, will also boycott Saturday's home Scottish Cup tie against Arbroath but Lennon would like to speak to the group's leaders to help resolve the situation.
"There is no doubt that they do bring something special to the stadium," he said.
"We want them back.
"I understand some of the reasons why they didn't come to the game.
"But we would like to sort it out with dialogue, come to some sort of conclusion and get them back supporting the team as they have brought so much to the club and the stadium, they have been so much help to the players and myself since I have been in charge."
A spokesperson for Strathclyde Police said: "We're aware of the comments on a number of social networking sites in relation to allegations of police harassment.
"We categorically deny that any particular group is unfairly targeted and if anyone thinks they have been unjustly treated they should feel confident in making a complaint. "
Meanwhile, Lennon will continue to monitor United States international striker Juan Agudelo.
The 20-year-old Chivas USA player has been training at Lennoxtown during the Major League Soccer close season.
The Hoops boss said: "He is a player who has impressed us and we hope to take it further.
"He has done very well in the two weeks he has been here.
"He needs a break because he has had a long season but we hope to speak to his representatives over the next week but again, it is too early to say one way or the other."
Lennon is also looking at Frank Acheampong, a 19-year-old left winger with one cap for Ghana, but said: "We need longer to assess Frank."
