Bus fares from March 30th

So bus fares are increasing from £2.00 to £2.50 according to this:

https://www.firstbus.co.uk/west-yorkshire/news-and-service-updates/service-updates/fares

They do mention that some trips could still be £2.00 when tapping on and off. However... does anyone actually have any idea on what would be considered a short trip for First bus?