(30 Dec 2017, 1:10 pm)tyresmoke wrote Suspect the 13/13A will run from Stockton in a loop from Grangefield one via the current route to Salters Lane then back direct via Durham Road & Bishopton Ave with the opposite half hour going the other way round. That would presumably save the 10 minutes needed to serve Stainton & Hemlington half hourly via one standard route.
That reminds me of what First did with the 4/4A(4/5 prior that) where my dad lives in Northampton,Both operated to The Headlands in a loop,both half hourly (i think) except one stopped at Kettering Road and Broadmead Avenue first whilst the other did Kettering Road Then the Headlands then Broadmead Avenue,then First decided to split it into the 7 and 8 which made it no longer operate in a loop,quite a shame really