Did the postwar Royal Navy have a plan and forces to counter threats around Suez?
Short answerYes. It maintained forces east of Suez and could converge from both directions, using carriers and other assets to deter or execute an intervention.
NotesThe Royal Navy normally kept significant forces, often including a carrier, east of Suez. In a crisis it could bring naval power toward the canal from both directions, first to deter or intimidate and then to support an operation resembling the military plan used in 1956. That plan was militarily feasible even though the Suez Crisis failed for geopolitical reasons.