MAFS UK bride returns to the show as experts issue warning to cast at first commitment ceremony

Married at First Sight fans were left questioning where bride Richelle was as she seemed to vanish from the hit matchmaking series during Wednesday's episode.

But a sneak peek has revealed she's back in the game for the first commitment ceremony.

Viewers will see Orson and Richelle stepping into the room hand-in-hand, which prompts raised eyebrows from their co-stars.

In a pivotal moment, expert Paul Brunson addresses the room as the experts highlight the importance of the ceremony's they're about to embark on.

Paul says: "Today is where the hard work really starts."

Echoing the sentiment, fellow mentor Mel Schilling elaborates on the gravity of their choices ahead, reports OK!.

She warns: "Let me remind you that a couple can only leave the experiment if you both write leave.

"If one person wants to stay, the couple must stay within the experiment until the next commitment ceremony."

Charlene Douglas, imparting wisdom to the participants, stresses the rewards of vulnerability and transparency throughout their journey.

Seemingly reconciled after Richelle was notably absent at Wednesday's dinner party, Orson and Richelle will no doubt be under the spotlight.

While their peers waltzed in with their matched person at the first dinner party, Orson walked in alone, spurring the others to clamour about Richelles whereabouts.

Taking it on the chin, he responded: "She just needs some time. It's just a process."

Opening up to fellow contestant, Alex, Orson contemplated his honeymoon phase, disclosing that feelings were beginning to stir.

However, Orson feared that Richelle might feel he's getting too attached too fast.

In a private moment, he admitted to the camera that he would have felt better with Richelle there.

He confessed: "I miss her terribly."

The experts, including Paul Brunson, are also pondering over Richelle's absence as they observe the dynamics.

Paul was worried that the issues might not just be with the process but between the couple themselves.

The question remains whether Richelle and Orson will confront their issues at the upcoming commitment ceremony.

Married at First Sight UK airs Monday - Thursday on E4 from 9pm.