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.
Northallerton
Northallerton is a market town and civil parish in the Hambleton district of North Yorkshire in England. It is positioned on the Vale of Mowbray and to the north of the Vale of York. Generally, it is the county town of the North Riding of Yorkshire and after the Local Government Act of 1972 came into effect in 1974, it has actually since functioned as the county town of North Yorkshire. At the time of the 2001 Census, it had a permanent population of 15741 and the town covers an area of 12. 90 square miles. It is assumed that there have been settlements in the region of Northallerton from Roman times, though it started to grow in value from the 11th century when land was gifted to the Bishop of Durham by King William II. Throughout the time of the Bishop's authority, the town emerged as an essential centre for churchly affairs. Trade and transport were to become more considerable after it was found that the surrounding area included big reserves of phosphorous, which soon brought industry to the town owing to of easy trade routes. Through this time, it also ended up being a popular stopping point for coaches travelling the route in between Edinburgh and London, till the arrival of the railway in the middle of the 19th century. The town was awarded its market town status in 1200 by Royal Charter, and there continues to be a market in the town today. Northallerton continues to be a considerable retail centre for locals, with its economy being formed mainly of light industry, commerce and farming services. For all of your home upgrades, make sure to make use of trusted specialists in Northallerton to make certain of quality.