| Clay to Barking | 4,306.94 mi (6,931.36 km) |
| Clay to Barnet | 4,293.19 mi (6,909.21 km) |
| Clay to Barnoldswick | 4,163.91 mi (6,701.17 km) |
| Clay to Barnsley | 4,199.18 mi (6,757.92 km) |
| Clay to Barnstaple | 4,148.30 mi (6,676.04 km) |
| Clay to Barrhead | 4,043.57 mi (6,507.49 km) |
| Clay to Barri | 4,173.88 mi (6,717.22 km) |
| Clay to Barrow in Furness | 4,119.70 mi (6,630.02 km) |
| Clay to Barton upon Humber | 4,236.34 mi (6,817.73 km) |
| Clay to Barton upon Irwell | 4,166.42 mi (6,705.20 km) |
| Clay to Barwell | 4,226.06 mi (6,801.18 km) |
| Clay to Basford | 4,223.95 mi (6,797.80 km) |
| Clay to Basildon | 4,322.48 mi (6,956.36 km) |
| Clay to Basingstoke | 4,266.10 mi (6,865.63 km) |
| Clay to Bath | 4,211.65 mi (6,777.99 km) |
