You should pull up and remove weeds by hand as and when they appear. If it is a regular problem, you might need to reseal the paving. In extreme cases, the sub layer itself may need to be re-laid. You can use weed killer, however some paving can be discoloured by stronger weed killers.
Jedburgh
Jedburgh is a community as well as previous royal burgh in the Scottish Boundaries and also the standard county town of the historical county of Roxburghshire. Jedburgh pushes the Jed Water, a tributary of the River Teviot. It is 10 miles (16 kilometres) from the border with England, and is dominated by the significant ruins of Jedburgh Abbey. Other noteworthy buildings in the town include Queen Mary's House, Jedburgh Castle Prison, currently a gallery, and the Jedburgh Library. Various other locations nearby are Ancrum, Bairnkine, Bonjedward, Camptown, Crailing, Edgerston, Ferniehirst Castle, Nisbet and Oxnam.