Lincoln is the capital of one of the least dense populated areas in England. Therefore, rail services are not the most dense in this area which means that it is not really easy to get here. Train services to most parts of the country involve changing trains at Nottingham. A direct service to London runs ocassionally, calling at more stations than you would like it to do. Other services run rather ocassionally as well, including to such tourist magnets like Peterborough, Doncaster, Sheffield and Cleethorpes.
If you visit Lincoln by train, please chose your ticket and connection wisely! Due to the scarce connections, you may get stranded in case you miss a train. I was left stranded at 8 p.m. after a daytrip to Lincoln with no more trains running to Peterborough!
Lincoln is great to walk. everything is nearby and you can go to the high street to the historical area (Bailgate) or to Brayford Waterfront Quarter in minutes. If you get tired, stop for a pint in one of the many pubs.
The local bus services are excellent. They go practically everywhere in Lincoln and very frequently.
You can get a dayrider pass for £2.70 or an unlimited weekly travel pass (which actually lasts for 8 days including the day of purchase) for £8. These are both really good value as a single trip will cost around £1.50
The best way to go to Lincoln is by car. From London take the A1north to Newark, then the A46 to Lincoln. There are several covenient car parks for visiting the main tourist attractions of the Cathedral quarter, including the Westgate car parks, next to the Water Tower. There are pay-and-display meters and parking is fairly reasonably priced by British standards at £1 for an hour, £2 for 2 hours, £3 for 4 hours etc.
Although Lincolnshire is covered in airports, these are nearly all used by the military (plenty of AWAC's can be seen just south of Lincoln)
The nearest, the Lincolnshire / Humberside airport is about as much use as a chocolate fireguard, with only a very few scheduled flights (one useful one to Amsterdam) and a smattering of charters during the summer.
UPDATE DEC 2005 : Ryanair have announved a dailey Dublin flight from April 2006, with other destinations to possibly follow in the future.
NEMA (Nottingham East midlands) is less than an hour away with a good range of low-cost flights, whilst the new Robin Hood (Doncaster / Sheffield) aiport is about 45 mins away. It is being used by Thomsonfly who are opening up a good range of low-cost flights.
Lincoln central is a busy enough station, but there are no direct trains to London. The council and tourism bodies have been pushing for years, but nothing has happened as yet.
It will usually take between 2 and two and half hours from London King's Cross with a change required in Newark (work out a good anagram for that one) or Peterborough.
Be warned - a chang in Newark may mean a change of stations, which is not great if you have luggage.
We usually go by train. One of the reasons Lincoln is one of England's cheaper cities to live in is because it is off the main transport arteries. The M1 doesn't touch the city, nor does the London to Edinburgh train line. However they are working on better train connections to London as the DISTANCE itself is not that far and they want to make it commutable so house prices might rise. So far, the easiest way to get here is by train along the London to Edinburgh line where you change at Newark in Nottinghamshire. Beware that there are two stations in Newark (Northgate and Castle) and try to aim for a connection where you only need to stay at Northgate station which is where mainline trains stop. In some cases it is easier to change at Peterborough (closer to London) and catch a train via the Lincolnshire countryside and towns like Spalding.