The Avon Canoe Pilot - Underfall Bank.

Carry the canoe through the pedestrian gate in the steam railway fence to the 
towpath. The fence that separates the river bank from the path has a buckle in 
it, find the buckled part and push the vessel through the space. Walk with 
vessel in hand, along the reed heavy bank. Take caution, there are sudden 
invisible leg breaking dips were the waters has eked away the bank. Find the 
most suitable entry point taking into consideration the speed of the flow from 
the nearby rapids.

Best conditions for using this point of entry and exit are when its dark, 
raining and you are desperate.