Counties on the M1 from Brent Cross to Leeds: There Are Five, Not Ten

The M1 motorway from Brent Cross (London) to Leeds (West Yorkshire) traverses five ceremonial counties—not ten. In order northbound:

1. Greater London – Brent Cross to M25 junction (Hendon, Mill Hill).
2. Hertfordshire – M25 to Bedfordshire border (St Albans, Hemel Hempstead, Luton fringe).
3. Bedfordshire – Short stretch around Luton/Dunstable (J10–J13).
4. Northamptonshire – Longest county section (J13–J19: Northampton, Daventry, Watford Gap services).
5. Leicestershire – J19–J21 (Lutterworth, Leicester forest edge).

Then: The M1 enters Warwickshire briefly (J21–J21a), Northamptonshire again (J21a–J22), Leicestershire (J22–J23a), Nottinghamshire (J23a–J28), Derbyshire (J28–J30), South Yorkshire (J30–J34), West Yorkshire (J34–Leeds).

Why the "Ten Counties" Myth?

Counting every county the M1 touches from London to Leeds yields ~10–11 (including re-entries). But the Brent Cross → Leeds segment specifically crosses only the five listed above before the motorway's character changes at the M62 interchange. The full London–Leeds corridor crosses 10 ceremonial counties; the M1 motorway itself crosses 9 (Greater London, Herts, Beds, Northants, Leics, Warks, Notts, Derbys, S Yorks, W Yorks).

Precision matters for traffic reports, logistics planning, and trivia nights.