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.
St Columb
St Columb Major is a town as well as civil parish in Cornwall, England, UK. Typically described locally as St Columb, it is approximately 7 miles (11 km) southwest of Wadebridge as well as six miles (10 km) eastern of Newquay. The designation Major identifies it from the close-by negotiation and also church of St Columb Minor on the coastline. An electoral ward simply called St Columb exists with a population at the 2011 census of 5,050. Twice a year the town plays host to "tossing", a medieval game when usual throughout Cornwall and now only played in St Columb and St Ives. It is played on Shrove Tuesday and then once more on the Saturday eleven days later. The video game entails 2 groups of several hundred individuals (the 'townsmen' and the 'compatriots') who endeavour to carry a silver round made from apple wood to goals established 2 miles (3 km) apart, making the parish, around 25 square miles (65 km2) in area, the de facto largest sports ground on the planet.