For the last three or so years, Stagecoach have run a Saturday service on bank holidays on the 100 but it's blindingly obvious that a Saturday service would be justified across the rest of the 'core' Newcastle network. But they are incredibly slow to react to changing travel patterns though. To take one of my local routes as an example, the Saturday and Sunday diagrams on the 22 have been far too tight for years and late running was the norm rather than the exception. They are reluctant to do anything because it would mean diagramming an extra bus or reducing frequencies (neither of which are Stagecoach hallmarks). It does look like there will (finally) be some changes at the end of May (brought forward from the original date of the end of August as suggested at the recent open meeting).