| Grinon to Pemberton | 921.92 mi (1,483.68 km) |
| Grinon to Pembroke Dock | 794.68 mi (1,278.91 km) |
| Grinon to Pen-y-Bont ar Ogwr | 780.21 mi (1,255.62 km) |
| Grinon to Penarth | 775.45 mi (1,247.96 km) |
| Grinon to Pencoed | 781.35 mi (1,257.46 km) |
| Grinon to Pendlebury | 921.11 mi (1,482.38 km) |
| Grinon to Penicuik | 1,078.88 mi (1,736.29 km) |
| Grinon to Penistone | 925.36 mi (1,489.22 km) |
| Grinon to Penkridge | 868.11 mi (1,397.09 km) |
| Grinon to Penrith | 999.55 mi (1,608.61 km) |
| Grinon to Penwortham | 935.86 mi (1,506.11 km) |
| Grinon to Penzance | 689.05 mi (1,108.92 km) |
| Grinon to Perivale | 800.22 mi (1,287.83 km) |
| Grinon to Perry Barr | 855.37 mi (1,376.59 km) |
| Grinon to Perth | 1,118.03 mi (1,799.29 km) |
