There are numerous mapping options to help with initial planning and creation of GPS files or printed maps - as well as creating routes*

Listed here, in alphabetical order, is a wide range of services/software/gadgets with links to them (opening in new windows) - some are free, some have a subscription charge, some work with a web browser, some work with an Android or iPhone, some have the facility to convert from one format to another - .gpx is the most common format.

There are also many apps for both Android and iPhone gadgets, mostly based on OpenStreetMaps or Google Maps.

Work in progress - links will be live shortly (at present - cut/paste)

 

Bike Ride Maps - https://www.bikeridemaps.co.uk

Bikehike http://bikehike.co.uk

Bikemap https://www.bikemap.net/en/routeplanner/

Bryton (GPS gadget with mapping) https://www.brytonsport.com/

Garmin (GPS gadget with mapping) garmin.com

Garmin Connect https://connect.garmin.com/

Google Maps (and Streetview) https://www.google.com/maps

Google Maps (convert route to .gpx) https://mapstogpx.com/

GPS Visualiser (format converter) http://www.gpsvisualizer.com

GPSIES http://www.gpsies.com

Just Go Ride https://www.justgoride.co.uk/

Komoot https://www.komoot.com

Memory Map - PC based mapping and route creation https://memory-map.com/

Mio (GPS gadget with mapping) https://www.mio.com

OnTheGoMap https://www.mio.com

OpenStreetMaps - free mapping https://www.openstreetmap.org/#m

Ordnance Survey https://www.ordnancesurvey.co.uk/

Osola (load .gpx to maps) https://www.osola.org.uk/rides/gpsuploader.htm

Plotaroute https://www.plotaroute.com

Ride with GPS http://ridewithgps.com/

RouteYou https://www.routeyou.com/en-gb

Strava (Ride recording/competition, with separate mapping capability) https://strava.com

Strava .gpx upload https://labs.strava.com/

Via Michelin https://www.viamichelin.co.uk/

Viewranger https://www.viewranger.com/en-gb

Wahoo (GPS gadget with mapping) https://uk.wahoofitness.com


* the webmaster's experience with services that offer "here to there" routing has been mixed - the results need to be checked to ensure that the route uses suitable roads/lanes (offering motorways or drover tracks isn't unusual!)
There are also errors in many of the base mapping with roads marked that don't exist, and roads that exist not marked - using Google Streetview is a good way to check if you're in doubt.

The list here is not definitive and is with no recommendation or warranty.