Page 225 - demo

0.6 mi 52.2162, 0.0378 Go str through the r/bout (take the second exit) on to Lower Rd, the A428
following s/post to “Bedford A428”.

1.7 mi 52.220249, -0.00000 Geographical curiosity. If you look at the GPS co-ordinates below,
you’ll see that the East co-ordinate is -0.2903 , but the co-ordinate above is 0.0378. The minus
sign has disappeared. That means you have passed over the Prime Meridian, the north-south
longitude line on which all longitude lines are based, and have therefore moved from the
geographical Western Hemisphere to the Eastern Hemisphere.The Prime Meridian is set at the
Greenwich Observatory in London.

Keep an eye out for an overbridge - the Prime Meridian is a few metres past that overbridge.

13.0 mi 52.2071, -0.2903 Follow the A428. Take the 1st exit from the r/bout on to Great North
Rd, s/posted “The North A1 / London / Bedford (A421)”

Go str ahd at the lights and stay in the left lane to merge on to the A1 South s/posted “London A1 /
Bedford (A421)”

1.7 mi 52.1844, -0.3060 At the Black Cat r/bout take the 4th exit on to the A421 s/post “M. Keynes
/ Luton / Bedford (A421)”.

From here you can take the side trip to the Shuttleworth Collection. (See side bar).

17.9 mi 52.0266 , -0.6084 Cross the M1 and at the r/bout take the 2nd exit s/posted “Milton
Keynes A421” to remain on the A421.

From here you can take the side trip to Woburn Abbey. (See side bar).

Continuing on to Milton Keynes . . .

If you took the side trip to the Shuttleworth Collection, this is where you rejoin.

On the right, after a couple of miles, you will see a string of huge box-like warehouses painted blue
and white.

3.2 mi 52.0328 , -0.6780 At the next r/bout, the Kingston Roundabout, take the 2nd exit on to
Groveway for Aylesbury s/posted “Aylesbury / Dunstable (A5)”.

0.5 mi At the next r/bout take the 1st left on to Tongwell St, s/posted “Aylesbury / Dunstable /
A4146”.

Just before that roundabout there’s a brown and white signs that says “For Bletchley Park follow
the A4146”.

Expert navigator checkpoint: Shortly after that turn you will pass underneath an overbridge.

At the next r/bout – Brown’s Wood Roundabout – take the 3rd exit on to Bletcham Way, s/posted,
among other things “Buckingham / Dunstable / Aylesbury / A4146 / (A5)”.

Expert navigator checkpoint: Shortly after that turn you will go through Walton Park
Roundabout and cross a bridge over Caldecot Lake.

2.7 mi 52.0076 , -0.7102 At the next r/bout, Caldecotte Roundabout, take the 1st exit on to the
A5, s/posted “A5 South / Dunstable / Aylesbury”.