It isn't possible to give a precise answer because it depends on where in each county you are travelling to and from, but around 50 miles.
Northamptonshire borders the counties of Warwickshire, Leicestershire, Rutland, Cambridgeshire, Bedfordshire, Buckinghamshire, and Oxfordshire.
The counties surrounding Oxfordshire are (clockwise from one o'clock): Northamptonshire, Buckinghamshire, Berkshire, Wiltshire, Gloucestershire, and Warwickshire.
The counties surrounding Oxfordshire are (clockwise from one o'clock): Northamptonshire, Buckinghamshire, Berkshire, Wiltshire, Gloucestershire, and Warwickshire.
All of the current model range is made in Gaydon, Warwickshire, England.
About 80 miles
About 200 miles
Luton to Verbier is around 850 km.
Leamington Spa, Warwickshire to Nottingham = 59.3 miles
Warwickshire, England
Buckinghamshire is one county
It is winter in January in Buckinghamshire.
Bletchley Park in Buckinghamshire not far from present day Milton Keynes.