Regarding your first question, the Daily candlestick closes at 5 PM Eastern time (New York) each day. Since you are in the UK that would be 10 PM your time.
No matter the time zone in which you live, the candles are live and a person in one time zone will see the same candle as the person who is in a different time zone. It is just that it will be at a different time in their respective time zones.
For example, right now it is 5:13 PM in New York and it is 10:13 PM in the UK. However, we are both seeing the same Daily candle. What is happening right now in the market is what is happening right now in the market regardless of your time zone.
There are numerous sites that can be found using a search engine that offer specifics on various time zones and how to convert from one to another.