| Gretna to Barking | 4,635.75 mi (7,460.52 km) |
| Gretna to Barnet | 4,622.02 mi (7,438.42 km) |
| Gretna to Barnoldswick | 4,493.68 mi (7,231.89 km) |
| Gretna to Barnsley | 4,528.86 mi (7,288.49 km) |
| Gretna to Barnstaple | 4,476.19 mi (7,203.73 km) |
| Gretna to Barrhead | 4,373.83 mi (7,039.00 km) |
| Gretna to Barri | 4,502.13 mi (7,245.48 km) |
| Gretna to Barrow in Furness | 4,449.48 mi (7,160.75 km) |
| Gretna to Barton upon Humber | 4,566.15 mi (7,348.51 km) |
| Gretna to Barton upon Irwell | 4,495.99 mi (7,235.59 km) |
| Gretna to Barwell | 4,555.27 mi (7,331.00 km) |
| Gretna to Basford | 4,553.40 mi (7,327.99 km) |
| Gretna to Basildon | 4,651.37 mi (7,485.65 km) |
| Gretna to Basingstoke | 4,594.57 mi (7,394.25 km) |
| Gretna to Bath | 4,540.01 mi (7,306.44 km) |
