For your own safety, you should think very carefully before deciding to navigate through a tunnel. These are our criteria for permitting canoes etc. to pass through:
- less than 400 metres long, and there are good sight lines through
- if it's between 400-650 metres long, and there are good site lines AND a single way traffic system in place
- we don't allow passage throuh other tunnels unless it's part of a managed event, which we have given permission for
- exceptions may be made on the basis of local risk assessments taking account of factors, such as potential smoke and fumes, existence of towpath/grab chains, etc.
