- London Euston ✓
- CMDNSTH +1
- CMDNJN ✓
- Willesden Junction +2
- Wembley Central +3
- Harrow & Wealdstone +2
- Bushey ✓
- Watford Junction +2
-
Kings Langley
a
= - Apsley +2
- Hemel Hempstead +1
- BONENDJ +1
- Berkhamsted +1
- Tring ⬤
- Cheddington ⬤
- LEDBRNJ ✓
- Leighton Buzzard ⬤
- Bletchley ⬤
- DNBGHSJ ✓
- Milton Keynes Central ⬤
- Wolverton ⬤
- HANSLPJ ✓
- Northampton ⬤
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