Listen to this article As part of the upgrades that Mercedes brought to its W13 for last week’s Bahrain test, it included an innovative mirror stay concept on its side impact structure fins – which included a range of vanes. Ferrari team principal Mattia Binotto suggested that, while the design complied with the regulations now, there was a risk that teams could go aggressive and push the boundaries even more in creating some ‘spaceship’ designs in the future. But, ahead of a meeting of Formula 1’s Technical Advisory Committee (TAC) on Tuesday, there is a belief that the issue will get addressed. Red Bull team principal Christian Horner said: “You certainly don’t want to get in to a mirror war. “So much time in these technical meetings over the last 10 years or so has been talking about the function of the mirrors and whether they become wings or not, and it is probably not the intention. “I’m sure in the right forum, in the TAC meeting they have, that will probably be addressed and discussed there.” The FIA’s head of single-seater matters Ni …