Three routes on missing NCN 1 by LaidBackBikes, on Flickr
All routes have to cross the A7 somehow...
Although many here would just take the road we know that younger and less experienced riders might be encouraged to cycle from Marchmont to the Innocent if this 'flagship' route was improved.
Route A is the one I use as it seems to have more space / less risky. Light crossings are available on all sections except the one at the end of the very spacious Buccleuch St is not aligned. This is something I think could be done relatively cheaply - similar example of box junction beside a pedestrian crossing can be found at Nicolson Square. At moment you have to walk round railings.
Route B is the one currently recommended on CycleStreets. This features wheelie bins, railings and a non-aligned crossing.
Route C is one I use myself but unsuitable for leading less confident cyclists.
Route D Cross Causeway is the other route. This has the technical problem of doing a right turn on a corner. Ok in reverse direction which I use at present. Causey is also a one way street at present. Residents want it re-developed - covered elsewhere on forum in the past.