b1
Latitude: 51°12'8"
Longitude: 2°47'38"
b2
Latitude: 51°12'11"
Longitude: 2°47'49"
b3
Latitude: 51°11'58"
Longitude: 2°48'2"
b4
Latitude: 51°11'56"
Longitude: 2°47'50"
v1
Latitude: 51°27'24"
Longitude: 3°2'26"
v2
Latitude: 51°27'18"
Longitude: 3°2'47"
v3
Latitude: 51°27'17"
Longitude: 3°2'21"
v4
Latitude: 51°27'28"
Longitude: 3°2'11"