Question: Name the modern road which parallels the route of the Great North Road which began in London and passed a grade II listed public house in Hatfield known as the Red Lion, an example of a coaching inn or staging post providing accommodation and stabling for horses?

Context paragraphs:
Old Red Lion, Kennington: The Old Red Lion is a Grade II listed public house at 42 Kennington Park Road, Kennington, London.

Red Lion, Westminster: The Red Lion is a Grade II listed public house at 48 Parliament Street, London SW1.

Cross Keys Inn: The Cross Keys Inn is a Grade II listed public house in Midford Road in the Odd Down area of Bath in the English ceremonial county of Somerset.  It is now a free house and restaurant and is a Grade II listed building, having been added to the register on 11 August 1972.

White Hart Inn, Crawley: The White Hart Inn, also known as the White Hart Hotel, is a coaching inn on the High Street in Crawley, a town and borough in West Sussex, England.  Built in the late 18th century to replace an older inn also under the sign of the White Hart, it also served as Crawley's main post office for most of the 19th century, and still operates as a public house in the 21st century.  Its partly timber-framed structure, which incorporates part of an early 17th-century building, is characteristic of the area.  It is designated a Grade II Listed building.

Great North Road (Great Britain): The Great North Road was the main highway between London and Scotland.  It became a coaching route used by mail coaches travelling between London, York and Edinburgh.  The modern A1 mainly parallels the route of the Great North Road.  Coaching inns, many of which survive, were staging posts providing accommodation, stabling for horses and replacement mounts.  Nowadays virtually no surviving coaching inns can be seen while driving on the A1, because the modern route bypasses the towns in which the inns are found.

Coaching inn: In Europe, from approximately the mid-17th century for a period of about 200 years, the coaching inn, sometimes called a coaching house or staging inn, was a vital part of the inland transport infrastructure, as an inn serving coach travellers.  Just as with roadhouses in other countries, although many survive, and some still offer overnight accommodation, in general they have lost their original function and now fulfil much the same function as ordinary pubs.  There are few motels with the function of refueling to motor vehicles, but the feeding function to horses was required for coaching inn.

Red Lion, Hillingdon: The Red Lion is a Grade II listed public house at Royal Lane, Hillingdon, London.

The Red Lion, Chipping Barnet: The Red Lion is a grade II listed public house in the High Street, Chipping Barnet, London.

The Wrestlers, Hatfield: The Wrestlers is a grade II listed public house on the Great North Road, Hatfield, in Hertfordshire.  The building has an eighteenth-century chequered red brick front based on a sixteenth-century core.

The Red Lion, Hatfield: The Red Lion is a grade II listed public house and former hotel on the Great North Road, Hatfield, in Hertfordshire.  The building dates from the late eighteenth century with nineteenth century additions and a large 1950s rear extension.

Supporting paragraphs: The Red Lion, Hatfield Great North Road (Great Britain)
Answer: A1