Can you come out of the security check in airport London if i am travelling from US to India and have a halt for 5 hrs?

It depends on the specific security regulations and policies of the airport in London where you will be transiting. Some airports may allow passengers to exit the security check area and re-enter before their connecting flight, while others may not.

Here are a few factors that can influence whether you can come out of the security check area in London:

1. Airport Regulations: The security regulations at London airports may vary. Some airports may have stricter rules and may not allow passengers to leave the security area, even for a short time. It's important to check with the specific airport authorities or your airline to understand the applicable rules.

2. Transit Time: Your 5-hour halt may or may not be sufficient for you to exit the security area, clear immigration and customs (if applicable), and return to the departure gate before your connecting flight. You should carefully consider the time it may take to complete these processes to ensure you don't miss your flight.

3. Visa Requirements: If you are required to obtain a visa for India, you should ensure that you have the necessary documents and permits to enter the country. If your visa requires you to collect it upon arrival in India, you may need to stay in the transit area to complete the visa process before proceeding to your final destination.

4. Luggage Handling: If your checked luggage is being transferred directly to your connecting flight, you may not need to exit the security area to retrieve it. However, if you need to collect your checked luggage or have any carry-on items that require additional screening, you may need to pass through security again.

5. Security Policies: Airport security policies can change at short notice due to various factors, such as heightened security measures or operational changes. It's always best to confirm with the airport or airline to stay updated on the latest security guidelines.

To ensure a smooth transit, it's recommended that you check with your airline or the airport authorities in London in advance to get accurate and up-to-date information about whether you can exit the security check area and the procedures you need to follow.