[Jody Barton]

Essentially Forza yes, the halo is provided by a Dutch company, can't remember the name, however, there are variations on a theme, different types of mounting I believe. However, that isn't the issue, the halo has to pass weight and stress tests while mounted, which requires a beefing up of the monocoque, which means more weight. So the minimum weight of the cars was increased by 6kg, the likes of Mercedes and RBR were aiming to pass those tests and be under the extra 6kg so they could use what weight they saved as ballast for set up... and they along with McLaren and Ferrari seemed confident of doing so. Now listen to what the other teams are saying about it and you can see the issue, they're saying the minimum weight should go up by 10 to 12 kg. It's an issue for sure. Whichever team can pass those tests by adding the lowest amount of weight will have an advantage.