London trip

My friends and I are planning to spend a day in London on on Saturday . Train leaving from Cardiff Station to Victoria Station which would take us around 2 hours and 10 mins . We intend to visit many places . First,  after arriving at Victoria , we will go to visit the Victoria and Albert museum which we have to travel to by the tube , taking the tube would cost us 1.80p each way . Arriving at the museum will take 5 mins . Buying a tube a tube card ( pay as you go ) so we can use it all the day is the easiest and cheapest way of using the tube . After visiting the museum , we will head to Buckingham Palace, taking pictures of the palace . Afterwards ,we will go to the St. James Park to have our lunch there , as the park has a good view to the palace .  Then after having launch we will go to continue our trip to the next place we will go to which is London Eye . We are going to get on it to get best view of London . The ticket costs usually almost 19 pound so we will buy it online as its cheaper to buy it advance . Afterwards , we will go to Downing Street and walk around it to take closer look at the Primer Minster's house . After that visit to the Downing Street we will head for King's Road as its known as a very good road for shops . We are taking the tube as well , which will  cost us 1.80p each way . When arriving at King's Road we will do some shopping for clothes and accessories . Then we are going to travel back to Cardiff from Victoria Station , after a long day in London . So far my friends and I ,we are planning to do all these things in London , hoping everything goes well when we are there in London as we  planned to .