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.
Lybster
Lybster is a village on the eastern coastline of Caithness in north Scotland. It was when a huge herring angling port, yet has declined recently, because of problems in the market. The Waterlines heritage gallery lies in Lybster Harbour as well as offers info on the history and also geology of Lybster. A small number of crab angling watercrafts additionally run from Lybster Harbour. Lybster lies on the eleventh section of the John O'Groats Trail, a long-distance strolling route from Inverness to John O'Groats.