Route Card 4 - Got Your Lines Crossed?

Plotting limits: PDF Map

Leftmost gridline = 20.

Part 1 (Masters, Experts and Novices)

Start at Bolam Grange.

Proceed via

22212223232323242424242424252423232626262425262626252625

Finish at next YYY.

There seemed to be two areas that caught you out here, which affected answers 4 and 6.
RC4) SH3 = 108. Quite a few of you answered 139, which probably means that in GS2323 you approached Red Ho from the South and went up the white, which picked up an extra SH 116. The route marked on the solution was a shorter alternative which bypassed that SH.

Route Checks
1) T
2) Ch+
3) W>Y
4) SH3
5) Finish Grid Square

Part 2 (Masters Only)

Continue via

-4-5-5?-4-5-5-5-5-3-3-3-3-3-3-6-6-3-6-6-6-6-6-3-4-5-6-6-6-6-6-6?-5-6

Finish at next WWW.

The grid lines were coded by subtracting their numbers e.g. GL26 = 2-6 = -4, GL28 = 2-8 = -6 etc.
RC6) Y>W = 7. Many of you gave an answer of 8. I'm guessing that in GS 2725 you took the white to cross GL 28 when in fact the shortest route was to stay on the yellow and take the third exit on the roundabout. Or is there another Y>W that I've missed? I'm sure you'll let me know.
RC7) The last two letters of Windlestone crossed the road near the end of the route, but in which order? Too difficult to tell so both sequences accepted. Some soul searching regarding whether the last m of Home Fm broke the edge of the road. Looking very closely with magnification there may be a tiny dink in the black edge of the road, so answers with and without allowed.

Route Checks
6) Y>W
7) letters
8) SH4
9) R
10) Finish Grid Square