This is designed to be an amble.  The distance will be determined by the walking ability of attendees, the weather and time taken for a coffee stop and a light bite/lunch towards the end of the walk. I propose visiting Worcester Guild hall and the cathedral (coffee stop) with the option to go a little further to Diglis lock on the river Severn and return via the Diglis canal basin. We can then decide where to go for more social time together over a light lunch nearer the train station.