Update

Thanks to all that have supported by signing the petition so far... I'm not trying to ruin the vibe of boomtown, I'm just looking for cheaper options than spending £12-15 three times a day. 

Keeping food cold for 5-7 days in the heat just isn't going to work. Supermarkets on site pay to be there, so the money goes back to the festival, and they have some decent meal prices from £5-£7, so you're not completely broke.