We start in the heart of the town, right in front of the castle. From there you can cover the length of the town from the Leisure Centre at the top of town, down almost to Thornwell at the far end. There is quite a lot of climbing involved, but a rewarding run back down to the castle at the end.
You should note that in order to make best use of an A4 map the map is rotated 20 degrees East, so that the North-South lines do not run straight up the map. This shouldn't matter to you unless using a compass to check your direction, in which case you need align the North arrow on the compass with the blue N-S lines, and not the edge of the map.
A couple of safety points: there are busy main roads running through the town, so you need to take particular care crossing these, and use the marked underpasses if those suit your route choice. Secondly, there are quite a few steep alleyways around the town, some of which include very narrow(front-to back) steps, which it is easy to slip off if going down hill too fast. Take care at these points.