If you visit Lincoln, 2 and 1/2 hours north of London by train, you are probably there to tour Lincoln Cathedral (most impressive) and Lincoln Castle. I have a soft spot the castleespecially the church inside. In it are individual prisoner cubicles that surrounded each prisoner so that he could only see the alter. Rather than punitive, I prefer to think of this as an early attempt to soften the symptoms of Attention Deficit Disorder. After touring the Cathedral and the Castle, you may be hungry. Instead of yielding to the temptations offered by nearby restaurants and pubs, I suggest a leisurely descent down 'Steep Hill,' a charming street, very steep. At the Town Centre, after a 10 -20 minute stroll downhill (3 minutes for athletes and small children), stop at Clarke's Bakery and pick up a fresh baked fruit tart for dessert (about 70 p). Also buy a 'long loaf of Combicorn bread (about 70 p) for later. Continue on down hill, under Bow Arch ,and over the canal. then immediately turn left (east) and walk along the south side of the canal one block to the Central Market. Across the plaza you will see an open Flower Market with two public benches. When you get there turn right (south) and in a few steps you will see the Sign of the Fish (at 42 Sincil). If it is around noon, there will be a short, fast moving line-up. Once inside, squeeze to the back of the tiny shop and order. Across the counter you will see an amiable ,hard working crew turning out generous servings of steaming fish and chips, sausage and chips, and chips smothered beneath peas or beans. Order fish and chips 'open,' (under £3 take away) or if you really are on a diet, only fish for £2. Vinegar and salt to taste, and pick up a wooden for on the way out. If you are lucky, the sun will be shining and the bench in the open flower market will be vacant. You can pay 2 or 3 times more for take-away fish & chips, but none are better. Enjoy!