How spot value is calculated
Each coin's spot value is its fine gold/silver/platinum/palladium content (in grams) multiplied by the current per-gram spot price in GBP shown on the dashboard. A Gold Sovereign holds 7.32g of pure gold; a 1oz Silver Britannia holds 31.10g of pure silver. Dealers pay close to spot when they buy and charge a premium above spot when they sell — the typical UK premium for each coin is shown on its individual page.