Delph Bridge Drain

Delph Bridge Drain is a 0.15-hectare (0.37-acre) biological Site of Special Scientific Interest north-west of Soham in Cambridgeshire.^[1][2]

Delph Bridge Drain

Site of Special Scientific Interest
Location	Cambridgeshire
Grid reference	TL 567 768[1]
Interest	Biological
Area	0.15 hectares[1]
Notification	1989[1]
Location map	Magic Map

This site has the only known British population of fen ragwort, which was previously believed to have become extinct in the UK in 1857, due to habitat destruction. It was re-discovered in 1971 when dormant seeds probably germinated following excavation of the drain.^[3]

The site is a short stretch of ditch next to the A142 road between Soham and Ely.