Justice – pronounce it “Joosteece”, for they are as French as they come – deconstruct the opposition between style and substance. Everything about them is preposterous, from the hipster facial hair via the rock-pig antics in their A Cross The Universe tour “documentary” DVD to the way that almost the entirety of their musical palette is cribbed from their countrymen and close associates Daft Punk.

The Hertfordshire market town of St Albans has not hitherto been renowned for its buzzing music scene: its hall of fame contains but a handful of names from the pop pantheon, most notably Enter Shikari and Lowgold (unless you count the fact that David Essex lives there). It’s not exactly Chicago in the 1950s or Liverpool in the 1960s. But now the citizens of this former Roman stronghold can hold their heads high, thanks to the emergence of Friendly Fires.

Armed American soldiers stand in the stone window frames of a ruined building in Berlin, curious and disturbing echoes of those classical statues that so often were used to add portentous significance to a facade; but here in a 1961 photograph by Don McCullin, they are overlooking, with some intensity, the East German military on the other side. The Wall has just been built.

Maybe my memory is playing tricks, but I seem to recall that Beirut had more of a swagger in their step, in their playing, and in their demeanour when I last saw them four years ago. It was at the Roundhouse, it was packed, and Zach Condon and his band were on an upward trajectory following the release of their acclaimed album, The Flying Club Cup; they moved with ease and oozed a sort of blowsy bonhomie.

There are some glorious sounds to be heard in the world of music: a big band in full swing; a symphony orchestra in full flight; a gospel choir; the Hammond B3 organ. But to my mind there’s nothing quite like the sound of a line of electric guitars – not chugging along like the Quo or Lynyrd Skynyrd, but meshing, interweaving, thrumming, humming, threshing, shredding, screaming; like Mogwai.

I spent a long time waiting for this gig to take off, but eventually realised that it wasn’t going to happen. To begin with I thought the band were just pacing themselves, playing a slow-burning set that would eventually explode into life, opening with the modest thrum of “The Runaway”, and following it with the similarly restrained “Anyone’s Ghost” and “Mistaken for Strangers”. But in the end, although The National moved up through the gears and finished the show with a big warm finale, still, it all seemed a bit flat.

My, haven’t they grown? In the several years (perhaps even a decade) since I last caught Placebo live, they’ve gone from being a scrawny three-piece with a somewhat thin sound – for much of the gig, I saw, they didn’t even have a bassist on stage – to become a properly equipped rock band with six on-stage members: here, on the first of two nights in south London, the band consisted of the regular trio, plus three side-persons on guitars, bass, keyboards and violin. They made quite a noise, blasting out satisfyingly slabby slices of sound.