These are the stations I'll be using in case anyone can provide more
advice:
- Westminster: Destination = Houses of Parliament
- Oxford Circus: Destination = Oxford St
- Marble Arch: Destination = Hyde Park
- St. Paul's: Destination St. Paul's Cathedral
- Covent Garden: Destination = Covent Garden
- Kings Cross: Destination = St. Pancras International Departures
Those stations are all pretty close to each other, don't forget about the bird's eye view from the top of a bus. Go to any London Transport - Transport for London - information desk, there's one at most major stations, and get the free Central London Bus Guide or use the Journey Planner on the app or website. It will clearly show the buses which are easy to use for your journeys.
For example, off the top of my head, if you are at St Pauls and want to go to Covent Garden take a bus along Ludgate Hill, especially the 11, 15, 23 and when you get to St Clement Danes Church (in the nursery rhyme, "Oranges and Lemons say bells of St Clements") in the middle of the street get off, cross the road and walk up the hill and you're there. no tube needed. Much more scenic.
Particularly if you stick to the Tube map and think that you have to connect the Central Line (St Pauls) with the Piccadilly Line (Covent Garden) and realise that that is very convoluted.
A lot of places can more easily be reached on foot.
Specifics -
Westminster. Easy. Whichever exit you use, and they are very very well labeled because the Members of Parliament have to be able to find their way, and some of them went to comprehensive schools, and when you are outside just look around. You won't be able to miss Elizabeth Tower with Big Ben at the top.
Oxford Circus. The busiest station on the network. No matter which way you go up will wind up on one of the corners. Unless you know exactly which shop you want it won't make any difference. Not only can you cross the junction straight across you can also cross on the diagonal. Wear a money belt. No, really. The place is absolutely rife with pickpockets targeting tourists looking around and gawking. They know that tourists have money, otherwise why would they be in Oxford Street? You can't pick them out but they can pick you out. Be aware and do not have money, cards, phones, tablets, jewelry, open purses, or purses of any kind, or backpacks, rucksacks or bum bags where they can cause a distraction and get at them. Yes really.
Marble Arch. Watch out for the Romanians sleeping rough and pickpockets. There are many other ways to enter Hyde Park on all sides. Tube to Hyde Park Corner (Piccadilly), Lancaster Gate (Central), and many many bus lines. If you want horses, the south side is much better. Kensington Palace, use Knightsbridge or South Kensington, or the bus. If you want Speakers Corner, you are stuck with a long walk or using Marble Arch. Be careful.
St Pauls is easy, particularly if you are already on the Central Line. Buses are good too. Or Mansion House or Blackfriars on the Circle and District Lines are not much further.
Covent Garden has lifts rather than escalators, is sometimes closed due to overcrowding or is closed if one of the lifts is out of action. Covent Garden station can be made exit only in high crowds. It is very very close to Leicester Square (and well marked) (Northern Line Charing Cross Branch and Piccadilly Line). Or can be reached on foot from many places.
I've run out of space so will continue in next post