We have been worried that filming underwater will not be accessible for us based on the time limit and our budget, so have been trying to come up with a realistic plan if we cannot carry this through. Laura linked me to a technique known as 'dry for wet' which may come in very useful an alternative route for us to film in or a back up plan if we chose the underwater option. 

Dry for wet is a film technique in which smoke, coloured filters, and/or lighting effects are used to simulate a character being underwater while filming on a dry stage.

Basically what we would need for this option is :

• A studio
• Fans
• Good slow motion cameras
• Green Screen