Fleet managers need to prepare for years of unstable policy, shifting technology and complex operations, according to an industry expert. The Department for Transport has committed to a “mid-point review” of the UK's zero-emission vehicle (ZEV) mandate in 2027, which could affect vehicle supply. Fleets are also facing a need to recalculate operating costs once the pay-per-mile tax system for plug-in hybrid and electric cars is finalised. The uncertainty is such that Ayvens is running quarterly customer briefings on legislation, manufacturer developments and wider political and economic events that can affect fleets’ costs and the supply of vehicles. Rather than just planning for the next renewal cycle, fleets need a three-to-five-year strategy that's reviewed regularly, not set and forgotten.