1 NW2 1LJ
2 NW4 1PT
4 WD6 3BL
5 WD25 8AA
6 WD25 0PR 
6a WD5 0SB (M25)
7 AL3 6AP (M10)
8 HP2 4UE
9 AL3 8EY
10 LU1 4AB
10a LU1 4LA (Luton spur)
11 LU4 8QR
12 LU5 6HE
13 MK43 0XX
14 MK16 0HR
15 NN4 5EZ
15a NN4 9XG
16 NN7 3NF
17 NN6 7UH (M45)
18 NN6 7SA
19 LE17 6BP (M6)
20 LE17 4HN
21 LE19 1WL (M69)
21a LE9 2AF
22 LE67 9PG
23 LE12 9BU
23a DE74 2TN
24 DE74 2YW
25 NG10 5GX
26 NG16 1PT
27 NG15 0DA
28 DE55 2EH
29 S44 5SJ
30 S43 4JE
31 S26 2AE
32 S66 9BQ (M18)
33 S60 5LD
34 S9 1UG
35 S61 2PP
35a S35 2XT
36 S70 5TY
37 S70 6PN
38 S75 4BU
39 WF4 3AT
40 WF5 9AF
41 WF2 0SY
42 WF3 3QA (M62)
43 LS10 1SE (M621)
44 LS10 1RX
45 LS26 8PJ
46 LS15 8QW

There is no junction 3 – full story here. Junction 43 is a little confusing, as it seems to be on the old M1 into Leeds – what is now the M621. I’ll have to check next time I’m up that way …

1 B60 1DD
2 B48 7AU
3 B48 7JF
3a B94 5DQ
4 B90 4EN
5 B91 2SS
6 B92 0EJ
7 B37 6TA (M6)
7a B46 3JB
8 B46 1LL (M6)
9 B76 0BB
10 B77 5PX
11 DE12 8AA

0 LE17 6BP (= M1 J19)
1 CV23 0AR
2 CV2 2SL (M69 interchange)
3 CV7 9GX
4 B46 3JD (M42 interchange northbound)
4a B36 9LU (M42 interchange southbound)
5 B35 7AD
6 B23 7PH
7 B43 6HD
8 B43 6NF (M5 interchange)
9 WS2 9DT
10 WS2 8TD
10a WV11 2RF (M54 interchange)
11 WV10 7LU
12 ST19 5PX
13 ST18 9AP
14 ST16 1JW
15 ST5 4DQ
16 CW2 5PS
17 CW11 4SR
18 CW4 7ET
19 WA16 0PN
20 WA13 0TA
21 WA3 6DR
21a WA3 7EY (M62 J10)
22 WA3 7EP
23 WA12 0HL
24 WN4 9LQ
25 WN4 0JJ
26 WN5 8HP (M58 J6)
27 WN6 0SE
28 PR25 4ZY
29 PR5 8AA
30 PR5 6ZE (M61 J10)
31 PR5 0UJ
31a PR2 5PZ
32 PR3 5LJ (M55 interchange)
33 LA2 0HZ
34 LA2 9HG
35 LA5 9XH
35a LA6 1JZ
36 LA7 7NS
37 LA8 0AP
38 CA10 3SU
39 CA10 3QG
40 CA11 8QT
41 CA11 0BJ
42 CA4 0AD
43 CA4 8AA
44 CA3 0HR

More than you could ever want to know about the junctions of the M6 at Route6.co.uk.

The idea behind this site was to create the most utterly futile collection of pages I could conceive of. Unfortunately, once I’d started, I realised that it could actually become quite useful – in particular for those nifty little in-car satnav gizmos.