Hello,
I can completely empathise with everybody. If consultancy is something people are interested in I can recommend the MSc in Environmental Consultancy that I did at Newcastle Uni. I know it's not for everyone and is quite expensive but I graduated in 2007 and the uni were really good at getting contacts for people and many people from my course have gone on into consulting. It's also worth applying to general construction companies who have an 'environmental' department rather than strictly environmental consultancies.
Funnily enough I ended up working for 7 months at Durrell in Jersey instead as a zookeeper, and am now having a crack at trying to get into conservation back in the UK. I must be a glutton for punishment
No joy so far, I'm amazed at how much experience is required purely for volunteer positions! It can be disheartening when you work your butt off at uni, do lots of volunteering and still don't get a look in, but I'm trying to stay positive. Good luck everybody!!