I find the exit markings here confusing.   OsmAnd told me to turn at 5B5C when really the right answer was 5B.   The signage on the ground is that 5B is the right turn to go NW on Thorndie and 5C brings you to Gorham.    It looks like the part from the 5B split to Gorham is still marked trunk/motorway.

I would propose:  moving the 5C designation from where it is to the split of the ramps for Gorham, and maybe marking the last NE chunk now motorway, past the turn to Gorham south, as ramp (link), as surely the speed limit drops as you approach the light, and once there's a "30" sign or whatever, it's ramp not motorway.