any folks here have an experience of having a long transit in london and getting out of the airport with a transit visa? if anyone has such experience would u mind telling me? i could visit a few castles and the famous london bridge u know! i am leaving US on the 15th and will be in london on the 16th.

i have a transit thats longer than 14 hours! please let me know guys! i dont wanna get stuck in the airport!