Today's a day to mark time passing, so I thought I'd share a picture of two clocks together.
The sundial is on the south corner of the south transept and would have been visible from within the Cathedral Cloister, allowing those walking there to check the time. I believe it dates from the 1670s.
The tower is Norman and part of the original building dating from 1079, when the foundations were laid by Bishop Wakelin. More information - here -.