1. The new highways which the Secretary of State proposes to construct along two routes, to connect the northbound and southbound carriageways of the new trunk road with Brighton Road (B2117) (as proposed to be improved) at Muddleswood (the highways along these routes being in this Order referred to as “the slip roads” and respectively given the reference letters A and B on the deposited plan), shall become trunk roads as from the date when the Order comes into force.