Block Blitz Block Paving Eco Cleaner Treatment: 8 x 380g Pouches – Removes and Prevents Algae, Moss, Black Spot and Weed Growth on 120 Sq/m of Paving : Amazon.co.uk: Garden
The UK's Best Weed Killer for Block Paving, Driveways & Patios
Permanently Kill Weeds on Block Paving, Patios & Pavers Forever
Some of the different ways to remove weeds & moss from paving
Roundup on Paths and Drives | Videos | Roundup Weedkiller - YouTube