Geograph - photograph every grid square

Inaugurated in 2009, the 273 mile long route follows the line of the Prime Meridian as closely as practical, using public rights of way. The route does not slavishly stick to The Meridian, but has been chosen to give an interesting, varied and memorable walk.
From the Meridian Monument in Peacehaven, the route goes over the South Downs, across the Weald, through Ashdown Forest and across the North Downs. In London, too much street walking has been avoided by the judicious use of woods, commons, parks; the excellent Green Chain Walk and the Pool and Ravenbourne Rivers as a way of reaching Greenwich. The Greenwich Foot Tunnel takes the trail north of the river where the Thames Path and Limehouse Cut lead to Stratford and then to Epping Forest, a green way out of London. From Waltham Abbey, the route follows the Lea Valley to Stanstead Abbotts, continues across the hills of Hertfordshire into Cambridgeshire and the halfway point at the village of Hardwick. A loop to Cambridge, through Grantchester, is provided as an option.
The third part of the route crosses The Fens, passes through March to reach Holbeach and then historic Boston. The final part traverses the lovely Lincolnshire Wolds to Louth and then reaches Cleethorpes on the south shore of the Humber Estuary. The trail restarts at the Meridian Marker near Patrington. From there it skirts Withernsea and reaches the end at Sand le Mere where the Meridian crosses the fastest eroding coastline in England.
The route uses GMT as a logo TQ3940 : Greenwich Meridian Trail Logo.