Question: How long, in miles, is the route of the National Cycle Network that passes through Conyer?

Context paragraphs:
National Cycle Route 17: National Cycle Route 17 is part of the United Kingdom's National Cycle Network.  It presently runs southwards from Rochester , via Maidstone to Ashford where it links with National Cycle Route 18.

Pennine Cycleway: The Pennine Cycleway is a Sustrans-sponsored route in the Pennines range in northern England, an area often called the "backbone of England".  The route passes through the counties of Derbyshire, West Yorkshire, Lancashire, North Yorkshire, Cumbria and Northumberland.  It is part of the National Cycle Network (NCN No. 68).  Sustrans founder John Grimshaw calls it 'the best National Cycle Network route of the lot'.

National Cycle Route 1: National Cycle Route 1 (or NCR 1) is a route of the National Cycle Network, running from Dover to Shetland.  The 1695 mi cycle-path is located in the United Kingdom.

National Cycle Route 15: National Cycle Route 15 is part of the National Cycle Network in the East Midlands which, when complete, will run from National Cycle Route 1 near Tattershall in Lincolnshire to Castle Donington in Derbyshire via Sleaford, Grantham, and Nottingham.

National Cycle Route 8: National Cycle Route 8 (or NCR 8) is a route of the National Cycle Network, running from Cardiff to Holyhead.  The route passes through the heart of Wales, and is also known by its Welsh name Lôn Las Cymru ("English: Wales' Blue Lane").  It is largely north-south from Holyhead to Cardiff or Chepstow, and in total measures some 400 km in length.  Some of its route follows the trackbed of former railway lines, such as Lôn Las Menai, Lôn Eifion, the Mawddach Trail and the Taff Trail; in other places, the route is on public highways.  A road bike with racing tyres would struggle on the former surfaces; a hybrid or 'hard tail' mountain bike fitted with wide road tyres would be a better choice.

National Cycle Route 44: National Cycle Network, Route 44, part of the National Cycle Network, connects Shrewsbury, Shropshire with Cinderford, Gloucestershire.  The part of the route from Shrewsbury to Bromfield is signed - the remainder of the route is currently unsigned.

Conyer: Conyer is a hamlet within Teynham civil parish in the borough of Swale in Kent, England.  It is located around one mile north of the village of Teynham, and at the head of Conyer Creek, which flows into the Swale to the north.  The Saxon Shore Way and National Cycle Route 1 pass through the hamlet.

National Cycle Route 657: National Cycle Network (NCN) Route 657 is a loop of the White Rose cycle route, NCN 65.  It branches off the main route to connect the town of Thirsk to the National Cycle Network.  Prior to 2009 the route had been signed as part of NCN 65.

National Cycle Route 20: National Cycle Route 20 is part of the United Kingdom's National Cycle Network.  It runs from Crawley in Sussex southwards to Brighton.  In future, the route will also connect northwards to London starting alongside the river Thames at Wandsworth, and will duplicate National Cycle Route 21 between Redhill and Crawley.

National Cycle Route 43: National Cycle Network, Route 43 is part of the National Cycle Network and the Celtic Trail, which connects Swansea with Builth Wells.  Most of the route is still awaiting development.  As of June 2006, there is a 13-mile section out of Swansea that is open and signed.

Supporting paragraphs: Conyer National Cycle Route 1
Answer: 1695 mi