The past few sporting weeks may have been busy ones with the European football season kicking off and cricket hitting the headlines, but for petrolheads it's only just getting interesting again. The Formula One season gets back in the swing of things in Belgium this weekend after the traditional mid-season break. The Spa circuit is an awe-inspiring one, perhaps the best on the calendar, with some iconic corners to test the drivers. In fact, the FIA seem worried that one section of the track might stretch the drivers a little too much. They've ordered that the back wing DRS system is disabled through the famous Eau Rouge. The governing body is concerned that it would be just too dangerous to use the device on what is now a flat out corner where speeds aren't far off 300km/h. DRS increases speed by reducing drag and that's not necessarily the best idea in this series of bends in a steep valley. During the race the DRS is only allowed in a short area elsewhere on the track, but during practice and qualifying it is usually allowed everywhere. Astonishingly, it's come to light that many drivers aren't always sure whether DRS is activated, ending up struggling to control their cars around corners. Not touching the brake means the system isn't automatically closed. No wonder then that safety has come first in this instance. It's not always been that way, particularly at Spa. A couple of days ago, I watched an astonishing documentary, called Grand Prix -The Killer Years. It was a sobering examination of just how dangerous the sport was in the '60s and '70s. Jackie Stewart told how he crashed spectacularly at Spa, hitting a woodcutter's hut and a telegraph pole. He was trapped for 30 minutes until he was freed by Graham Hill using spanners borrowed from spectators. Stewart knows he was one of the lucky ones. On the programme he said 57 of his friends had died in racing. Astonishing though that might be, it's not really surprising when he calculates that during his career he had a two out of three chance of dying. Some of the images in the film were truly distressing, with drivers being burnt alive at the wheel of their cars. The Scot spearheaded the campaign for better safety at tracks, with Spa being cancelled once after a driver boycott. The circuit was removed from the calendar for over a decade due to safety fears. It was a long, hard struggle, but Stewart and his supporters finally won the argument. The last driver death was in 1994, and the last F1 fatality (a marshal) was 10 years ago. Perhaps the most important thing Stewart succeeded in doing was giving the drivers a voice. The drivers were key in deciding to ban DRS at Eau Rouge. Those who put their lives on the line should be the ones who have the biggest input on these decisions. The current track is much changed from days past but it is still breathtaking and it will be interesting to see who comes out firing on all cylinders after the short break. McLaren arrive the form team having won the previous two races. They are talking a good race, and will be aiming to put further pressure on the Red Bull team. Crucially, it's not just their race pace which has impressed but their improving qualifying performance. However, Lewis Hamilton is third in the championship, 88 points behind Sebastian Vettel. It would take not just McLaren dominance in the second half of the season but a spectacular meltdown by Red Bull to see Hamilton or Jenson Button take a second world championship ahead of the German. Then there's Ferrari. Fernando Alonso is in the chasing pack and if he isn't able to mount his own challenge he will certainly have the ability to put a spoke in the wheel of the others.