I'm going on a day's training course on Thursday and we've been told that there is no on-site catering and no food outlets near enough to use at lunchtime so we're asked to take a packed lunch. Can anyone think of anything I can take that won't need refrigerating? The thought of ham salad sarnies that have been in my bag on a possibly hot day isn't exactly appetising. 
Please don't suggest 'nothing' because I'll be having breakfast at 6am to get there in time and won't be eating until after 8pm in the evening.
Am I going to be stuck with either jam or peanut butter sandwiches?

Please don't suggest 'nothing' because I'll be having breakfast at 6am to get there in time and won't be eating until after 8pm in the evening.

Am I going to be stuck with either jam or peanut butter sandwiches?
).
No kettle available so no Snot Noodles or soups possible. (There's a coffee machine, apparently, and that's all!)