When Lauren and Andy are holding hands in the final scene, we first see them from behind, and Lauren's hand is in the back (facing the camera) while Andy's is in the front. The next shot of them shows them from the front and they are holding each others hands the other way around.
In 1952, Tower Bridge was painted chocolate brown. The red, white and blue color scheme in the clip was introduced for the Queens Silver Jubilee celebrations in 1977.