Answer:
If I were in London right now, I would go see Big Ben and Buckingham Palace. If I were in London right now, I would go see Big Ben and Buckingham Palace.
Step-by-step explanation:
The second option uses the subjunctive mood to express a hypothetical situation.
We use the subjunctive mood to talk about a wish, a suggestion, or a hypothetical situation. In this mood, the verb to be: is, are, and am becomes, be in the present tense. In the past tense, the verb to be was, becomes were, like in the sentence If I were in London. The verbs with s, like works, cooks, makes in the subjunctive mood go without the s.
The original sentence says, " I want to be in London right now. I really want to see Big Ben And the Buckingham Palace" It is expressing a situation that is not real. The person imagines the situation. The sentence If "I were in London right now, I would go see Big Ben and Buckingham Palace" with the word were, is talking about a hypothetical situation using the subjunctive mood.