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.
Llanwrtyd Wells
Llanwrtyd Wells is a village and also neighborhood in mid Powys, Wales, in the historical region of Brecknockshire (Breconshire) on the Afon Irfon. The town gets on the A483 in between Llandovery and Builth Wells and is located near the pass between the Tywi and also Irfon valleys. The community likewise consists of the smaller sized negotiations of Llanwrtyd and also Abergwesyn, the valley of the Afon Irfon, as well as a big part of the "Desert of Wales". With a population of 850 (United Kingdom Census 2011), it claims to be the smallest community in Britain, although Fordwich in Kent has a smaller sized population. Unlike its previous background as a health club community, when hundreds crowded to take the waters for their declared medicinal impacts, the area is currently much better recognized for entertainments such as pony trekking, hill cycling, strolling and birdwatching, as well as for its annual Man versus Horse Marathon, Beer Celebration and World Bog Snorkeling Championship. The town's biggest employer Charcroft Electronics is located in buildings which were previously the Dol-y-Coed Hotel. The hotel, on the banks of the Irfon, dates from regarding 1535.