Is the route already planned now?
Between kirton and market raison, will we be using the B1192 to langrick bridge, then follow NCN 1 to bardney (taking the on road "winter route" near bardney to avoid an unsurfaced section of the route only really sutible for mountain bikes, the rest of the water rail way railpath is well surfaced with tarmac). Then take B1202 north straight to market raisen via wragby. That is what I would consider the quickest, easiest to navigate, flattest route from my local knowdge of the area and avoids 'A' roads entirely, 64.6km .