The cache:
A nano magnetic
A little about this place:
There was famously a wooden bridge at this crossing point which charged a toll - It cost a ha'penny - half an old penny - to cross.It was closed in 1920’s after falling into disrepair.
It’s modern replacement in 2002 is a steel lifting mechanism which continues to allow access for boats that occasionally make their way up and down the creek. A long local campaign and collaboration from all sectors of the local community succeeded in getting it designed and built. One of it’s key protagonists Pete Pope died in 2012 and his ashes were scattered here in noisy celebration.
Deptford Creek is the mouth of the River Ravensbourne which rises 11 miles south at Ceaser's Well in Keston, near Bromley. In just six hours the tide at Deptford Creek can rise or fall as much as 7.5m; over the year it peaks at 7.7m but can also fall to as low as just 10cm.
Reference: https://friends.deptfordcreek.net/anchorholds/hapenny-hatch/