**New 2026 F1 regulations create the primary uncertainty for safety car deployment at Silverstone.** Lighter, smaller cars with active aero and a 50-50 electric-ICE power split introduce large speed differentials during deployment and harvesting phases, as seen in early-season incidents like Oliver Bearman's high-G crash in Japan. Silverstone's high-speed layout, including Copse and Maggotts-Becketts, has historically produced frequent incidents requiring the safety car, with implied probabilities often exceeding 80% in recent previews. Enhanced crash structures, stronger roll hoops, and two-stage nose designs improve protection but do not eliminate the risk of spins or debris from the new car's handling characteristics. Driver concerns, including warnings from Lando Norris about closing speeds of 30-50 km/h, underscore the potential for incidents while also highlighting how improved safety features could reduce the need for interventions. Trader consensus near 51% reflects this balance between Silverstone's proven incident rate and the unknowns of the regulation overhaul. Late-season form, qualifying weather, or any confirmed mechanical issues could shift probabilities quickly.