Question: Stainby is a hamlet in the South Kesteven district of Lincolnshire, and is situated 2 mi west from the A1 road, the A1 is the longest numbered road in which country?

Context paragraphs:
Dry Doddington: Dry Doddington is a small village in the north-west of the South Kesteven district of Lincolnshire, England within the civil parish of Westborough and Dry Doddington.  It is situated approximately 5 mi south-east from Newark, approximately 8 mi north-west from Grantham, and just over 1 mi to the east from the A1 road.

Sempringham: Sempringham is a hamlet in the South Kesteven district of Lincolnshire, England.  It is situated 2 mi south from the A52 road, 12 mi east from Grantham and 8 mi north from Bourne.  The hamlet is in the civil parish of Pointon and Sempringham , and on the western edge of the Lincolnshire Fens, the closest village being Billingborough, 0.5 mi to the north on the B1177 road.  Sempringham is noted as the home of Gilbert of Sempringham, the son of the lord of the manor.  Gilbert is the only English Saint to have founded a monastic order, the Gilbertines.

Skillington: Skillington is a village and civil parish in the South Kesteven district of Lincolnshire, England.  The population of the civil parish at the 2011 census was 345.  It is situated 1.5 mi west from the A1 road, 6 mi south from Grantham, and is within 3 mi of the Leicestershire border.

Stainby: Stainby is a hamlet in the South Kesteven district of Lincolnshire, England.  It is situated 2 mi west from the A1 road, 1.5 mi east from the Viking Way and the Leicestershire border, and 8 mi south from Grantham.

Swayfield: Swayfield is a village and civil parish in the South Kesteven district of Lincolnshire, England.  The population of the civil parish at the 2011 census was 316.  It is situated just over 3 mi east from the A1 road, 9 mi south-east from Grantham and 10 mi north from Stamford.  It has approximately 138 houses.

Gelston, Lincolnshire: Gelston is a village in the South Kesteven district of Lincolnshire, England.  It is situated 2 mi west from the A607 road, 5 mi north from Grantham, and in the civil parish of Hough-on-the-Hill, a village 1 mi to the north-east.  It is in the civil parish of Brant Broughton and Stragglethorpe.

A1 road (Great Britain): The A1 is the longest numbered road in the UK, at 410 mi .  It connects London, the capital of England and the United Kingdom, with Edinburgh, the capital of Scotland.  It passes through or near North London, Hatfield, Welwyn Garden City, Stevenage, Baldock, Letchworth Garden City, Huntingdon, Peterborough, Grantham, Newark-on-Trent, Retford, Doncaster, Leeds, Harrogate, York, Ripon, Darlington, Durham, Sunderland, Gateshead, Newcastle upon Tyne, Alnwick and Berwick-upon-Tweed.

Easton, Lincolnshire: Easton is a village and civil parish in the South Kesteven district of Lincolnshire, England.  It is situated almost 2 mi north from Colsterworth, and 1 mi east from the A1 road.  It is in the civil parish of Stoke Rochford.

Gunby, South Kesteven: Gunby is a hamlet in the South Kesteven district of Lincolnshire, England.  It is situated close to the borders with Leicestershire and Rutland, and 9 mi south from Grantham, and 2 mi west from the A1 road.  It is in the civil parish of Gunby and Stainby.

Stroxton: Stroxton is a village in the South Kesteven district of Lincolnshire, England.  It is situated 3 mi south from the centre of Grantham and about 1 mi north-west from Great Ponton and the A1 road.

Supporting paragraphs: Stainby A1 road (Great Britain)
Answer: UK