Contingency Plan

As some of my video will be shot outside I must come up with a contingency plan in the event of rain or another reason why I can't film outside. The scenes where Heather is laying and sitting on the grass outside I will film inside instead and change the end of the video so she doesn't walk downstairs. Instead, the end will be filmed in my room (where she was originally) and I will add more shots of 'Emily' singing at the end to fill the gaps where Heather would have been walking downstairs.
In the scenes where 'Emily' is singing against the brick wall I could also film this inside but film against a black wall. This would be slightly difficult as I would need the correct lighting to make it seem like a studio and not like a black sheet or wall. Hopefully I will be able to film outside for these scenes and as I only need Sophie for these scenes I should be able to change the day if the weather isn't good.