Hi jodie and welcome to the forum
Your IVA Supervisor will determine how much of your bonus and additional money you have to pay over, but if you have the usual 50% uplift clause then there is your answer.
I suggest that you tell your Supervisor that you are deploying to an area where communications back to the UK will be difficult, but that you will keep all of the extra money in a savings account to be sorted out on your return to the UK.
Take care out there and keep safe.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk