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.
Melrose
Melrose is a village and civil parish in the Scottish Borders, historically in Roxburghshire. It lies within the Eildon committee area of Borders Regional Council.