Made by Steve Coogan's Baby Cow stable, Common Ground is a collection of ten 15-minute comedy shorts, each set in a neighbourhood in south London. Having featured Simon Day, Amelia Bullmore, Jessica Hynes and Charles Dance in previous weeks, the series concludes with Barry - based around Alex Lowe's octogenarian little Englander character which he honed by calling in to Iain Lee's LBC programme in the mid-2000s. With his wife having run off with a retired financial advisor, Barry embarks on a bucket list with his grandson.

It may not be earth-shatteringly original, but it's worth it just to hear Barry's view on pink candy floss: 'It's like eating Barbara Cartland's minge.' A (fictional) former member of So Solid Crew takes over a church choir in the far-funnier Nell, Ted and Marlon. It quickly descends into a creepy love triangle (with One Foot In the Grave actress Annette Crosbie occasionally chiming in with some unexpected filth); the humour is sharp, surreal and pleasantly wicked in places.

Never let it be said I don't give things a chance. The second episode of The Persuasionists was marginally better than last week's yawn-fest, mainly because there was more going on, but "The Handsomeness" was still a laugh-free zone for the most part. Things perk up whenever Daisy Haggard or Simon Farnaby are around acting silly, but it's otherwise a waste of time and talent.

The plot this week involved a campaign for beauty cream "Night Gak", being modeled by bimbo popstar Victoria (Kelly Adams), who revealed to Greg (Adam Buxton) that she's looking for an "ordinary" boyfriend, prompting him to demonstrate his innate facileness in order to woo her. Meanwhile, Emma (Haggard) was given a position of power that led to her quarantining all the ugly employees in the agency's boiler room.

Look, there's definitely potential in an advertising agency sitcom with an episode focusing on beauty, but The Persuasionists is too daft to land any insightful blows, and its surrealism isn't clever enough to feel inspired. The IT Crowd does a far better job of skewering workplace/pop-culture targets via oddball, larger-than-life comedy. Here, you just have Iain Lee acting like he's still reading The 11 O'Clock Show's autocue, and Jarred Christmas bellowing.

Advertising sitcom The Persuasionists was so imbecilic, you had to see it to believe it. Episode one centred on the marketing campaign for "Cockney Cheese" and the slogan "Cockney Cheese. Leave it aaaaaat !"

"If he's a Cockney man, strolling along in Cockney London," pointed out their client, 'Cockney Jim'. "He wouldn't be surprised to find some Cockney cheese ? Would he ?"
Er... no.

The Persuasionists stars Adam Buxton, Jarred Christmas, Simon Farnaby, Iain Lee, Lee Ross, and is written by Jonathan Thake. Boys, your friends are embarrassed to know you.

'From the makers of The Inbetweeners!' trumpeted the press release. 'Written by the man renowned for the "slag of all snacks" campaign for Pot Noodle!' it continued in full big-sell mode. OK, so the second claim was a touch desperate, but there was still a sliver of optimism twitching in my remo-finger as I prepared to be persuaded by The Persuasionists (BBC2).

How wrong can you be? Despite gaining kudos for a title that sounded like it was dedicated to a cult 1960s harmony group who only ever recorded two tracks on an obscure Memphis label before imploding in a soul stew of drugs and sibling-related adultery, thus guaranteeing legendary status, The Persuasionists turned out to be as tasty as, well Pot Noodles - and cold ones, at that.

There were warning signs: Iain Lee, for one, here sporting a strange spray tan and spray-on hair and the same self-satisfied sneer that made him so irksome on The 11 O'Clock Show. Surely, though, he'd be balanced out by Adam of Adam & Joe fame and a script, by Jonathan Thake, that promised an insider's assault on the absurdities of advertising.

Well, no and no. 'Adam Buxton - what were you thinking?' was the note I wrote as his character Greg turned out to be as dripping with weary clichés as the rest of Thake's join-the-dots advertising idiots. Thake might have a killer way with advertising slogans but, on the evidence of The Persuasionists, he can't tell the difference between satire and stereotyping. The Persuasionists was rammed to its smug rafters with the latter.

Come to think of it, does advertising even need sending up? Such an easy target, and The Persuasionists, with its shouty Australians, dodgy foreigners with big pencils and smelly Cockney cheese gags, missed it by a country mile. Now watch it clean up at next year's Comedy Awards.

The Beeb's latest sitcom is hewn from the same rock as The IT Crowd: it's big, bold, colourful and obvious. The setting this time is a hapless advertising agency - waters charted much better in the recent Martin Clunes remake of The Fall And Rise Of Reginald Perrin. Still, it might be a grower, in the same sledgehammer way that Miranda was - and fans of Iain Lee and Adam Buxton will appreciate their putting in an appearance.

Set in the world of advertising, this new sitcom has its own unique selling point: it's approximately one-third funny. The third succeeds because every time Simon Farnaby steps in as sex-crazed international fixer, Keaton, it's to do something hilarious with a big pencil. The rest fails because the other execs (Adam Buxton, Iain Lee, Jarred Christmas and Daisy Haggard) are something-and-nothing characters, and fail to add anything clever or convincing to the flabbier bits of the script. Nevertheless, there are some genuinely good ideas here, and the team's battle to put together a convincing campaign for a new product, cockney cheese, is leavened by the presence of guest star Lee Ross. He makes a marvellous cockney, possibly because until recently he played Denise's ex, Owen, in EastEnders.

When American scriptwriters decided to put the advertising world on telly, they gave us the perfectly scripted and critically acclaimed Mad Men. This side of the pond we end up with The Persuasionists, which follows the more traditional vein of Brit sitcoms.

It's often said advertising execs have no idea what they're doing and the five idiots in this certainly live up to that image. They work for HHH&H and have to come up with a clever campaign for Cockney Cheese, a bizarre brown cheese that smells of something incredibly unpleasant (I won't spoil the revelation - it's almost certain to give you a chuckle). Creative Billy (Iain Lee, in his first acting role) has come up with a slogan and it's up to uncertain Greg (Adam Buxton) to sell it to the client, Cockney Jim.

Trouble is, he's terrified of Jim, a caricature of an EastEnders baddie... played by former EastEnders baddie Lee Ross (he was Owen Turner). And unlike one colleague, Greg doesn't have a giant pencil to save the day (that's not a euphemism - one of them really has a giant pencil).

The series is written by former ad man Jonathan Thake, who was responsible for Pot Noodle's "the slag of all snacks" campaign, one of the most complained-about TV ads of all time. I'd love to have seen how he managed to sell this little show to the Beeb.