Paul Whitehouse and Charlie Higson's spoof phone-in Down the Line is easily one of the funniest Radio 4 shows since On the Hour, and the former Fast Showees bring its inane host Gary Bellamy (Rhys Thomas) to life as he travels around the country meeting ordinary Britons. Rather than the satire of its Radio 4-bear, the set-up is essentially an excuse for Fast Show-like sketches as Bellamy meets assorted listeners/weirdos played by Paul, Charlie, Simon Day, Felix Dexter and co. It's almost very good, but not yet as sharp as the original show.

In 2006 a new late-night phone-in on Radio 4 prompted a slew of complaints from listeners. It emerged that Down the Line, hosted by the bland yet "award winning" Gary Bellamy, was no dumbed-down phone-in, but a loving spoof engineered by Fast Show creators Charlie Higson and Paul Whitehouse, who voiced many of the show's bizarrely believable callers. Three series later they've found a way to bring their caricatures to TV, while at the same time gently mocking those celebrity-travels-around Britain series.

Bellamy (Rhys Thomas) sets off around the country to meet his public, from Higson's senior citizen Humphrey Milner ("Oh, I've brought you into the wrong room!") and boisterous "Lion of Harlesden" Early D (a lovely turn from Felix Dexter) to ageing "60s bad boy" Ian Craig-Oldman (classic Whitehouse). The comedy lies in the sweetly pitched mannerisms and absurdities: not a lot happens, but it happens hilariously. Credit to Thomas, too: a straight man of the old school, he manages to make everyone around him funnier.

Charlie Higson on Bellamy's People

Comedian Charlie Higson talks to Benji Wilson about his satirical new comedy series which he created with Fast Show colleague Paul Whitehouse.

Paul Whitehouse on new comedy show 'Bellamy's People'

Comedians Paul Whitehouse and Rhys Thomas discuss their new fake reality TV show, Bellamy's People.

They explain how they adapted it from its original version on Radio 4, a spoof phone-in show called Down The Line.

Bellamy's People: The celebrity road trip gets skewered

Paul Whitehouse and Charlie Higson have adapted their hugely popular radio satire about a spoof phone-in for the small screen. The character-comedy masters tell James Rampton how they did it.

A couple of years ago, Radio 4 listeners were outraged to hear a phone-in shock jock, Gary Bellamy, and his motley crew of callers turn up on their hallowed station. No need for panic: it turned out to be Charlie Higson, Paul Whitehouse and various friends riffing as characters from posh Nazis to traffic wardens - the kind of social satire that gave us Loadsamoney. Now it's hitting the telly as Bellamy's People, a mockumentary in which Bellamy joins the legions of other documentary presenters clogging Britain's roads in search of a TV series. Comes with its own spoof behind-the-scenes footage. The best scene: Bellamy trying to interview Muslims.

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Behind the scenes: Bellamy's People

Following their Radio 4 comedy, Charlie Higson and Paul Whitehouse took the show's weird and wonderful characters on a road trip across Britain.

Meanwhile, anyone who tunes in to Radio 5 Live will recognise the absurdity of many phone-in programmes, and regular listeners to Radio 4 will have heard Down The Line, the phone-in spoof masterminded by Fast Show-ers Paul Whitehouse, Charlie Higson and Simon Day, which starred Rhys Thomas as host Gary Bellamy. Listeners to both will know how close to reality Down The Line's absurdist take on the phone-in format and its listeners is. And also how funny it was - a Berkshire racist ringing in says after a reference to Ebony & Ivory, "we just call that Ivory in our house". Thankfully - for anyone who's ever had the displeasure of watching Jeremy Kyle et al - Gary is meeting the public face-to-face as he travels around the country to chat to his deranged callers.

A one-off special edition of the spoof phone-in show, an eve of Budget salute to all the things we don't know and can't grasp about what's happened to the economy and why having a balance in the bank is suddenly a bad thing. Presented, as ever, by the utterly witless 'Gary Bellamy' (Rhys Thomas) with the only too believable callers played by Paul Whitehouse, Amelia Bullmore, Felix Dexter and co, with special guest Mark Gatiss. Word is that this show is about to transfer to television. Ah well, that'll be another one gone to where the big money grows.