If you plan to visit London a weekend or three days, our advice is that you wait to do it in low season. It is on these dates when airlines lower their prices and leaving for 2 or 3 days can be surprisingly cheap.
At this time, there is time to see the main tourist attractions of the city: British Parliament, Big Ben, Tower of London ... You have all the information in: «How much money to bring to London according to the duration of the trip«.
You have all the information in: "How much money to bring to London according to the duration of the trip".