Part 1 (Masters, Experts and Novices)

TC1 at SH 3 in 3750, depart S. Avoid the following black spots (100 metre radius unless stated):
386 503       3851 West half of square       393 507       4050 South half       395 512       401 516
402 507.5 (50m radius)       414 512.5       4250 NW quarter       423.5 511       425 517       431 516
425 521       424 529       4254 whole square       415 532       408.5 528.5      405.5 518 (50m radius)
400 523 (50m radius)       401.5 528.5       396 539       397.5 550      4055 West half     to TC2 at LC

Part 2 (Masters Only)

Your route must:
1. Use exactly 4 level crossings (excluding TC2);
2. Cross ETLs only 4 times;
3. Pass within 200m of 4 Windmills (measured to the centre of the X);
4. Cross grid line 33 a total of 7 times;
5. Visit 5 non-staggered cross roads;
6. Avoid all spot heights with a value of 2;
7. Always turn right from a white road onto a higher class road;
8. Use less than 2100m of green road;
9. Observe all black spots from part 1;
10. Finish at a bridge (TC3).

Part 1
Accurate plotting of the blackspots should have left only one possible route. RC3 was tough, but I felt a valid way of verifying the route. Regulation 17 tells you that a blackspot does not add any 'artificial' NTR's for counting purposes.

Part 2
I hope you didn't get run over by a train whilst sitting at TC2 and plotting pt2... You had to visit GS3556 to comply with rule 5, many missed this and hence SH in 3656.

RC8 - Two possibles, to allow for equidistant routes from 3555 to 3654.