Here's another couple of journeys.
Bicester to MaryleboneIf ever there was a route that's been transformed since the early 70s it's this one. From a downgrade in the Beeching era from main line to/from Paddington and the Midlands, the service was terrible until the Chiltern Line Total Route Modernisation got rid of old signalboxes replaced by Marylebone
IECC▸ and also the clunky old Class 115
DMU▸ 's that worked most of the trains were replaced by modern Class 165 Turbos. That had started to impact on the number and speed of trains from the early 90s.
Post-privatisation, Chiltern Railways have steadily improved the infrastructure further, completing the redoubling of Princes Risborough to Bicester North in the late 90s, and Bicester North to Ayhno Junction in 2001. New 100mph Class 168s helped reduce journey times. A further infrastructure project completed late in 2011 improved linespeeds to 90-100mph for much of the route and with increases in speeds at various junctions on the route has paved the way to today's service, which, once again makes it a main line route.
Total number of trains has increased five-fold in the last 30 years and the fastest journey time has shrunk from 72 to 47 minutes. Sundays have seen a total transformation with more than six times the number of trains. Back in 1974 there was an 11:22 and 15:12 train and nothing else leaving before 7pm. Instead of those two trains, there are now thirty-two in the same space of time!
Moreton-In-Marsh to OxfordA less dramatic increase in services, but a steady one nonetheless. From a low of ten trains back in 1974, there are now double that per day. Eighteen of which are through trains to Paddington, the majority operated by
HST▸ or Class 180s. Back in 1983 there were just two through trains to Paddington. Sunday services on the route have tripled in those years too.
Journey times have been stagnant and in some cases have been extended though so it's not all good news.