Arriva X1 Runcorn-Liverpool, the old route was given 55 minutes end to end, but even off peak buses could be 15-20 minutes late or even later due to traffic, then add in traffic lights, some junctions are a nightmare to cross because traffic lights are on red for ages, then green for a short time delaying buses even further.
I have a few timetables from the 70s & 80s what makes me laugh is buses were timed to take the same journey time all day including early morning/late evening & Sundays, which meant on some journeys it felt like the bus was going at 5mph on a clear run. I always remember back in the day buses i was on, had to wait at the last stop before the terminus for a few minutes as they were so early, nowadays even when buses are early, drivers can't wait quick enough to get to the terminus.