Claim: There is only one single-digit A road in Zone 8 of the Great Britain numbering scheme; A8, which is a 42.9 mi major road in Scotland.
Evidence: A8 A80 A81 A82 A83 A84 A85 A86 A87 A88 A89 The A8 is a major road in Scotland, connecting Edinburgh to Greenock via Glasgow. 42.9 mi (69.0 km)