No need to panic chicken you will be fine mate. don't be distracted by the snake
It all about planning, planning and budgetary limitation. IMHO £700 quids will be more than fine
Since its your first road trip keep the itinenary simple eg Brum-dover-calais-belgium- holand(Amsterdam)- belgium- calais-dover-brum. decide what you want to see or visit( Jixaman's proposed Belgian jaunt is exciting, but Amsterdam is a must).
You can book you hotels or B&B beforehand or get a deal when you get there from asking around(that's what i do...more exciting and alweays get cheap deal in really good hotels/B&. decide how much you need on food/booze/etc and fuel based on your itinenary.
Make sure you have a good sat nav(Nurrish's or tom-tom) to avoid unnecessary detours and go through your checklist for all things you might need travelling abroad. this site as mentioned covers everything.
http://www.theaa.com/motoring_advice/ov ... pment.html
Get the zed in good shape, check/inform your insurance, Tracker provider and breakdown cover and have a contingency plan(contacts, credit cards etc) in case something goes wrong but i doubt it will. But oserve all precaustions as you would whne going someplace you are not familiar with
Finally relax and have fun and enjoy the food , vista and the GT capability of the zed .
Give me a call if you have any other querries mate