Conkers

Sticking with Mathew Baynton, I still have a minor thinking that it's Olly Murs or Ben Shepherd though.

Clue Detail	Mathew Baynton
Knight Costume	Roles in Horrible Histories & Yonderland.
"Abs from Five" Pic	"Born 2 Rule" sketch (George IV boyband parody).
Red Swimming Shorts	Taskmaster S19 "short shorts" malfunction.
Sam's Tavern Songs	Character Sam Pinkett (The Wrong Mans). Musical comedy background.
Doc: "Taking on Foes"	Plot of The Wrong Mans & role in A Good Girl's Guide.
Lego Heart	No clear link
Campfire Cooking	Doc Martin (Chef), Ghosts(Scout/Campfire setting).
Drumsticks	Musician (Dog Ears); Horrible Histories "Viking Drummers" sketch.
"Ghosts don't scare me"	Creator/Star of BBC's Ghosts. Plays a ghost.
"Mr Fairhead"	Credited role in Casualty (Ep with Charlie Fairhead).
"Be Mine" from J	J = James Corden?

Sloth

Sam Thompson has been my main guess for a while, but I've thrown in Steve Davis too....

Clue Detail	Sam Thompson	Steve Davis
Handcuffs	PERFECT MATCH (Viral Podcast Stunt with Pete Wicks)	No link I can make
"Guide to Manchester"	MATCH (Soccer Aid Run destination)	WEAK (Northern snooker circuit association)
"Jungle Juice" (Voted No. 1)	PERFECT MATCH (Winner of I'm A Celebrity 2023)	PARTIAL (Contestant in I'm A Celebrity)
"Spin Doctors"	MATCH (Radio DJ "spins"; Made in Chelsea spin)	MATCH (Techno DJ; Snooker spin)
Snooker Cues	METAPHOR (Radio "Cues"; "Break" my stride)	LITERAL (Professional Snooker Player)
Alarm Clock	MATCH (Hits Radio Breakfast Host)	No link I can make
Gazza (Crying)	MATCH (Famous for crying on TV)	No link I can make
"The GC"	MATCH (Reality TV colleague/friend)	No link I can make
"Break My Stride"	THEMATIC (Reference to Soccer Aid injury/resilience)	IRONY (Slow snooker player moving fast)
High Energy	MATCH (Known for hyperactive persona)	MATCH (DJ Thundermuscle persona)

Toastie

I've been thinking Mica Paris for a while, with Brenda Edwards as a possibility, but the clues are hard to match for either, here's my best attempt:

Clue	Mica Paris	Brenda Edwards
Calendar: August 20th with 3 Balloons	WEAK LINK: Born April 27th.However, her debut album So Good was released in August 1988, appearing in some archives around August 20th.	NO LINK I CAN FIND
Visual: Clown Wig & Boom Mic	POSSIBLE LINK: Recorded a cover of **"The Tears of a Clown"**with the Royal Philharmonic Orchestra.	NO LINK I CAN FIND
Visual: Brick with Diamond	WEAK LINK: Lyrics in songs like "My One Temptation" refer to value, but no literal "Diamond in a brick" connection.	**POSSIBLE LINK:**Sang "Diamonds are Forever" on X Factor? (Generic link).
Verbal: "Rebel with a cause"	POSSIBLE LINK: Provided the title track for the movie soundtrack Young Soul Rebels.	**POSSIBLE LINK:**Played the "Killer Queen" (a tyrant, not a rebel) in We Will Rock You.
Verbal: "Fresh out the bakery"	POSSIBLE LINK: Released her debut album at a young age (19).	NO LINK I CAN FIND

HERE'S A CURVEBALL - Sophie Aldred - mentioned her in my first guess weeks back, the clues are bang on, and she's done musicals, but not sure she can sing like that..... Mind you, being a trained singer, could probably mimic it.

Clue	Sophie Aldred
Calendar: August 20th with 3 Balloons	PERFECT MATCH: Born August 20th. The "3 Balloons" represent the "Triple Birthday" anomaly in Doctor Who: she shares the date with Sylvester McCoy (The Doctor) and Anthony Ainley (The Master).
Visual: Building Site / "Messy" / "Drill"	PERFECT MATCH: Voiced Muck (a digger/bulldozer) in Bob the Builder. Muck's catchphrase is "Muck loves mud!" (Messy).
Visual: Clown Wig & Boom Mic	PERFECT MATCH: In Doctor Who: The Greatest Show in the Galaxy, Ace fought the Chief Clown and robotic clowns. Her signature prop was a Boombox.
Visual: Brick with Diamond	PERFECT MATCH: Starred in the Doctor Whoaudio drama "The Veiled Leopard" which centers on a diamond heist.
Names: Vernon Kay, Sara Cox, Peter Kay	CRYPTIC MATCH: All three are famous people from Bolton. In Doctor Who lore, Ace’s companion Hex is explicitly from Bolton.
Character Name: "Toastie"	PERFECT MATCH: Played the character Wendy Nook in the sitcom Toast of London.
Visual: 5 Playing Cards (Aces)	PERFECT MATCH: Played the companion Ace. The hand (Aces and Eights) represents the "Dead Man's Hand," linking to her dangerous adventures.
Verbal: "Rebel with a cause"	PERFECT MATCH: Ace was defined as the "Rebel" companion (punk style, explosives, anti-racist activist).
Verbal: "Fresh out the bakery"	PERFECT MATCH: Likely refers to her early career in children's TV (e.g., Pie in the Sky or just the Toastie/Bread pun).
Visual: Peacock Feathers	PERFECT MATCH: Dated the actor/writer Daniel Peacock.

Can of Worms

Who - Sticking with Marvin - but including the clue grid I have for JB Gill for those who are adamant it's JB Gill (on my matrix, it's 95% Marvin/5% JB Gill)

Clue	Marvin Humes	JB Gill
"Green Fingers"	Matches (Symbolic): Marvin was the designated Green member of JLS (hoodies, merch, branding).	Matches (Literal): JB is an actual farmer with "Green Fingers," but his JLS color was Yellow. The clue uses his skill to hide Marvin's color.
"Richard Hammond & James May" Photo	Matches (Exact): Marvin's full name is Marvin Richard James Humes.	No obvious match
"New Recipe" Label	Matches: Refers to his pivot from music to cooking shows like Cooking with the Stars and This Morning food segments.	Partial Match: JB has done cooking segments on Down on the Farm, but "Recipe" links stronger to Marvin's primetime cooking host role.
"Early Bird" Label	Matches: Marvin is a regular relief host on This Morning(Daytime/Morning TV) and hosts mid-mornings on KISS.	Matches: JB presents CBeebies morning shows. This clue fits both to maintain the mystery.
"Naughty Step"	Matches: Marvin has explicitly discussed using the "Naughty Step" technique with his children in interviews.	Weak Match: JB is a father, but the specific phrase "Naughty Step" is a known "Marvin-ism" from press coverage.
"Jamie XX" Label	Matches: Jamie XX is a DJ, and Marvin is also a DJ.	No obvious match
"Written in the Stars"	Matches: JLS collaborated with Tinie Tempah (who wrote the song) on the single "Eyes Wide Shut".	Matches: Also applies to JB as a member of JLS. A group clue.
"Stoked" (Stoke-on-Trent)	Matches: JLS performed a massive gig at the Britannia Stadium in Stoke. Marvin was quoted saying "Wow, Stoke is loud".	Matches: JB was also present at this gig. Likely a location marker for the band's history.
Suitcase with "MLE" & "Heart"	Matches: MLE = Maldives. Marvin proposed to Rochelle in the Maldives - Matching the MLE and heart on the label.	No obvious match
"Canadian Birds" / "Stitches"	Matches: "Canadian Bird" (Singer) = Shawn Mendes. Song = "Stitches". Marvin hosted The Voice UK when Mendes performed "Stitches".	No obvious match
"Pecking Order"	Matches: Refers to the Nando's "High Five" Black Card hierarchy. Marvin is a known holder of this card and jokes about it on radio.	Partial Match: Fits the "Farmer" theme (chickens)
"Runs in the family"	Matches: JLS members refer to each other as brothers. Marvin hosts The Hit List with his wife, Rochelle.	Matches: JLS brotherhood. Fits both equally.
"Zucchini at the Trade Show"	Matches: "Zucchini" = My Life as a Courgette. Marvin hosted the BAFTA Children's Awards where this film won big.	Only links to JB via the generic "vegetable" theme.
Plant Pots / Gardening	Matches (Metaphorical): "Growing" a new career; "Green" branding.	Matches (Literal): JB is the farmer. This is the primary visual misdirection designed to make you guess JB.

Red Panda

I keep bouncing between Greg Rutherford and Simon Le Bon. I cannot decide if it's a good singer really trying to hide his voice, or just someone that cannot sing. Leaning more towards Simon Le Bon - though Simon is taller than Joel, and Red Panda I don't think is.

Clue	Simon Le Bon
5 Rio Street	5 Members of Duran Duran. Album Rio.
Birmingham	Band formed in Birmingham (1978).
New York (Postmark)	Rio album remixed in NY for US release.
Hairspray	80s New Romantic aesthetic.
Roger Moore Poster	A View to a Kill (Bond Theme).
Gold Rocks	Song "Gold" (Spandau Ballet rivalry).
Babies Dummies	"Cry Baby Cry"?
5 Arrows	The 5 Band Members.
"Scaling new heights"	Metaphor for fame.

Moth

Keisha, still. Nothing moving me on this one!

Clue	Connection to Keisha Buchanan
"Urban Moths"	"Urban" was the industry category for R&B/Soul music in the UK, Keisha's primary genre. It also serves as a setup for the "Sugabug" nickname connection.
Irn Bru & Highland Cloth	A cryptogram for her surname. Buchanan is one of the oldest and most famous Scottish clans, possessing its own tartan ("Highland cloth").
Ice Cubes (Rising to join)	A visual metaphor for the band's history. Keisha was the "one" separated from the group who eventually "rose up" to rejoin the other two originals (Mutya and Siobhan) to reform the Sugababes (MKS).
Smashed Record	The Sugababes hold the Guinness World Record for the most successful female act of the 21st Century in the UK.
Carrot	A symbol for Bugs Bunny, leading to the word "Bug." Keisha’s longstanding fan and band nickname is "Sugabug".
Blue Jay	Represents Jay-Z. Keisha famously signed a solo deal with Jay-Z's label, Roc Nation, after leaving the band in 2009.
"Served in the West"	Refers to her time living in the US (West Coast) while signed to Roc Nation. It also double-links to her birthplace, Westminster.
Ronnie Corbett	The late comedian was the voiceover announcer for the ITV game show Ant & Dec's Push the Button, referencing the Sugababes' #1 hit "Push the Button".
Morris Dancing	A geographic clue. One of the most famous troupes is the Westminster Morris Men; Keisha was born in Westminster. It also alludes to "dancing in a round" (Round Round).
"Welcome to Montana"	A pop-culture link to Hannah Montana (Miley Cyrus). The Sugababes recently had a viral moment covering Miley Cyrus's hit "Flowers" on BBC Radio 2.
"Saxy"	References the Sugababes' hit "Run For Cover", which features one of the most recognizable alto saxophone solos in UK pop history.
"Sweet Nectar"	A direct synonym for Sugar (Sugababes).
"Larva not a fighter"	A play on the phrase "Lover not a fighter." This references Keisha's attempts to rehabilitate her reputation after being branded a "bully" by the tabloids in the 2000s.