Four big new car launches will dominate the London motor show next week – but there’s plenty of other stuff that’s worth looking at.The new Vauxhall Insignia is the biggest launch of the event, with the Mondeo-fighting family saloon set to dramatically improve on the outgoing Vectra. We’ve already had a sneak preview of Vauxhall’s new family motor and we know that its interior has the class-leading Mondeo beaten. The big question is how it will be received by the public at the show.Perhaps an even more readily anticipated London launch is the Ford Focus RS – without doubt the most exciting attainable performance car we’ll see this year. Team RS engineers were still working on the scorching Focus at the Nurburgring just weeks before its debut. We’ll find out just how close they’ve got the ST’s 2.5-litre five-cylinder engine to 300bhp. Elsewhere, Honda will deliver yet another aerodynamic, low emissions concept car – the Honda OSM. That stands for Open Study Model and it’s the fourth small hybrid power concept car Honda has built in two years. Lotus will also release its ‘Project Eagle’, the car the Norfolk sports maker hopes can propel it to the big time. Lotus sources claim this will be a genuine Porsche Cayman rival, and its real name will be announced at the London show. There are plenty more British offerings too, including a limited edition, very plush Range Rover Autobiography. Plus IFR Automotive will launch the ambitious sounding Aspid – a two-seater that promises Bugatti Veyron rivalling performance. And UK-based Lightning Cars will be there showing its electric sports car for the first time. If you’re visiting Excel then, away from the array of driving experiences, concerts and motorboats in the dock outside, there’ll be plenty to find out from the cars on display. Have a look at the exposed welding on the Ferrari 430 Scuderia - it’s weight saving taken to extremes. Or open the powered tailgate on Citroen’s C5 Tourer, which is programmable so you can set it stop at any height you want. Squeeze yourself and three mates into the Toyota iQ to see how well that innovative seating system works. And while you’re at Toyota’s stand try to find the fuel filler cap on the mental Aygo Crazy (Hint: it’s where the engine used to be). Turn on the lights and open the glovebox in the Jaguar XF - both are operated by touch sensitive switches. Then wander over to Mercedes and moan about their decision not to make the GLK in right hand drive. You could go and badger Hyundai about importing its Genesis coupe too – if enough people ask, they’ll do it. Also why not run a quality control test on the Cadillac CTS’s cabin? You might be surprised by how well-appointed the interior is. Then go and peer into the Koenigsegg’s cockpit and remind yourself its costs £415,000…Plenty to do then, and if you can’t make it to Excel next week remember we’ll be bringing live coverage, analysis, blogs and videos from the show floor on Tuesday.